I'm sorry you struggling.
I could be wrong in my impressions.
It sounds like you've been dealing with a BF for a while who kinda sneaks around.

Then trying to decide whether to end it or go along with his poly suggestion to see if that "solves" the poor behaviors and he stops sneaking and starts behaving more trustworthy. Even though you are monogamous and not poly. Is that it?
If so? It just doesn't sound deeply compatible me.
Over the past year to maybe 6 months he has been expressing he has been poly and that is why he tends to reach out to other females, including getting caught bong on tinder.
Was this BF cheating on monogamous agreements with you?
What's up with the Tinder thing? Was that him cheating on your shared agreements?
What kind of character does this BF have? Is he a person of his Word or he just says whatever in the moment?
Cuz it is possible to realize things about yourself later in life like being poly and not be sure how to handle it and make some mistakes.
It's also possible to try to "explain away" bad behavior when caught so one avoids taking personal responsibility and so one can keep on "coasting" through life without really changing.
He says it was to seek out some validation and he does not feel complete on our relationship even though besides all that it is going good.
I would say NOT going good, since "emotional honesty" seems to be missing. "Trustworthy behavior" also seems to be missing.
Your relationship with him is not supposed to "complete" him. It's to share love together. Does his behavior seem loving toward you?
He's supposed to do his work on himself HIMSELF. Not use people to fill whatever "holes" he's got. Is that what he does?
So recently he asked to start training a friend from his job at the gym. At first it was hard for me but I figured we can start building our trust this way. He told me they were only friends and she has kids. I had a gut feeling but I agreed to it.
If you had a feeling he was just "saying whatever" to you to get his foot in the door with dating her? And now that he's found out she likes him and willing to date him? But he's not actually in an Open relationship so he's kinda cheating on agreements? Then he's putting cart before horse.
You were right. It was NOT "just friends." And he couldn't be trusted to be honest with you from the start.
So... you have to decide what to do with this BF if that's how it played out.
- You could keep dating him, and accept he's just not to be trusted at his Word.
- You could call it enough times giving him chances to build trust by being up front and honest. And you could stop dating him if this is all he brings you now -- headaches and lack of trust.
Now my boyfriend is expressing how he feels being poly is not by trying to sleep with everyone but by wanting to add just another person to our relationship.
That's nice. He can want whatever he wants.
And you can say "No, thanks. I don't want to do that. I don't want to add people. So best we part. We have become incompatible."
He expressed he has been having feeling towards this girl at work he has been training and she feels the same way. I am monogamous and completely unsure how to feel.
You might feel sad, angry, disappointed, tired... or all the above or more.
Keep it WAY simpler on you. If you are monogamous? You don't sound like you want to participate in any poly things.
If he wants to date her on the level?
He could do so by being clear with you that he wants to open the relationship first before approaching her.
Or ending it with you respectfully first because he wants to and you don't before approaching her.
Rather than cart before horse/ stringing you along. Like you are the "safety net" if his "extra" doesn't pan out.
I suggest some soul searching and taking a step back.
Fine, he has this big poly revelation. But to sneak around on Tinder? Is that even healed yet?
Then him try to get you into throuple with the gym lady? For WHAT? To assuage his guilt for starting it with gym lady all shady to begin with? (Who knows what stories he tells her. )
I am totally guessing. But if that's what's going on here -- there is a lack of emotional honesty and he's just not treating you well. So YOU could treat YOU well.
You could do your soul searching and decide that you could be up for poly.
But that still doesn't mean you want to do poly with HIM because he behaves poorly toward you.
I am slightly open to seeing if a throuple would work but can not promise this to him, because for me this is nothing I thought I would have to experience or think about.
But do you even WANT to do a throuple with someone you aren't sure you trust? Do you WANT to experience that or think about it?
I think open relationships / poly happens best when it comes from a "joyful yes!" place.
It's ok to be newbie. We all are at some point. But usually people WANT to go there and are looking forward to it.
You do NOT sound happy. More like kinda railroaded along because you don't have time to process and digest the last headache with him before here comes a new one. You don't sound like you
want to go there.
You say you are monogamous. At the same time, you might not be ready to end it with this BF, even though it sounds like he's been behaving kinda iffy for a while now. You need time and space to think and maybe grieve ending this (if you are going to end it). If he's making flurries of activity, it's hard to do that because you are constantly off balance.
Maybe take a weekend off on your own to think? Get to some quiet space before making any decisions?
Another point is my boyfriend and I have already agreed we did not want to have kids and he does not understand how dating someone with kids makes you another parental figure.
That is correct. Dating a mom is different than dating child-free adults. But you know what? You have ENOUGH on your plate without taking on board this problem. That's the mom's problem -- who she allows around her kids.
YOUR problem is dealing with a BF you don't trust because he behaves like this towards you. And deciding what to do about it.
Does anyone have any suggestions or views from someone who has always been monogamous and how that can work out ?
You mentioned dating him for 3 years and it starting to get wonky after about 2 years in.
There's a name for that -- New Relationship Energy. It lasts 6 mos to 2 years, and then you REALLY find out if you are compatible or not. The pink fluffy lala clouds lift and you see the person's true colors. If you are finding out that this BF is not deeply compatible when his true colors came out? That is a bummer. And it hurts to realize it. Nobody LOVES breaking up.
But again... don't make single load bummer into double or triple. Sometimes in dating that happens. People who are initially compatible are not DEEPLY compatible. They part ways. That's part of what dating is FOR -- to find the really really really compatible ones.
Do your soul searching and remember to be true to
your values and what
you want from your relationships. If he no longer makes the cut? He just doesn't make the cut. It's a bummer, but you do not have to bend yourself into pretzels just to hang on to this dating partner. It's ok to break up respectfully so both people can come out of that with some dignity.
I think if you are
monoamorous (want one sweetie) and
relationship shape flexible and can do either monogamy or open/poly models as an end point to a V or similar - then it
might be ok. Provided you WANT to participate joyfully in it. AND if the mix is compatible.
Cuz it depends on the mix of people. Just all three people being joyfully up for poly doesn't change the fact that "initially compatible" does not automatically mean "deeply compatible" in poly dating. Just like it doesn't in monogamous dating.
I think if you are
monoamorous (want one sweetie) and
monogamous (only want 1:1 relationship shape), then as much as it hurts?
You might be best off being emotionally honest with yourself first:
- He doesn't meet your personal standards for what behavior you expect from a partner and how you want to be treated.
- And now he's asking you to do stuff you are just not into -- throuples.
Then be emotionally honest with him:
- A throuple is NOT what you want in life.
- Poly is NOT for you. You prefer monogamy.
- So you are ending it with him so he can be FREE TO pursue whatever poly things he wants. And you can be FREE FROM poly stuff you do not want.
I can only imagine how tough the feelings are right now -- but keep your actions and behaviors simple. Align them with the things YOU value.
If things are in an UGH place and things stink? Go for the least stinky choice rather than piling on extra UGH.
I'm sorry this is happening.
Galagirl