I don't think it's 'tolerance of ambiguity' to be able to see it otherwise, but engaging in holding two contradictory ideas.
XBF (who btw saw himself as very enlightened

) kept telling me that he could have two equal relationships, that my being a girlfriend and her being a wife had no impact on me, that I would be like any other girlfriend and absolutely 100% never ever ever 'second.'
...
When push came to shove, he admitted that his wife and marriage were his 'priority.' Words mean something. If X is the priority, Y, by definition is not. He should have been honest about that much earlier in the relationship, instead of engaging in word games with me and trying to convince me I was somehow an equal priority and importance in his life.
Thank you for writing this - I really feel like I'm either stupid or crazy sometimes trying to understand poly
Maybe people lose sight of the difference between *love* and *logistics*. You can love two people at the same time - even the same amount! - but time and energy are finite.
I struggle sometimes because I still see Dag's problems as, well, *Dag's* problems. While I see any issue Andy has as *our* problem. A lot of that is the inevitable result of being entangled with one partner and not the other. If Dag loses his wallet, I'm sympathetic, I can offer advice... But it doesn't directly affect me, and there's nothing I can really do. If Andy loses his? Well, shit, that's also my bank account and credit at risk. And I can call credit card companies, health insurance, etc, to get replacement cards, log in to all his accounts, etc.
Sometimes it's just a matter of, with friends and non escalator relationships, you don't *know* everything. I have to ask Dag what I can do to help if there's a problem, ask when he's free to meet up, ask what's going on in his day. Whereas when you live with someone... you almost get all that by osmosis. It's simpler and easier to schedule stuff, help out, find time together.
I know some poly people are determined to do the hard work to make escalator and non escalator relationships feel equal and balanced. I'm sure many do manage it. I just... I do not feel up to that task, I guess. Maybe it will happen naturally once Dag and I have been together longer. But I definitely don't feel I can *promise* that to Dag, or anyone. I feel like it would be really shitty of me to pretend otherwise.
In your case, since you have really close friends and especially if you allow for romance with friends, maybe there is no "gap" to fit a boyfriend relationship in.
The difference between FWB and boyfriend? 100 people 100 words. For me, it's romance or the debth of it. I am not likely to call someone I have fallen in love with a boyfriend. That means, along with other things, I will miss him terribly if we don't meet for a week. Also, I am more likely to place expectations like "sure he can make time for me", or "sure he can help me move" on them (perhaps unfair, but that's how I work). FWB is a friend I have sex with

, so I will meet him how often convenient to both and place less expectations.
I think this is a really good analysis. I do have a few casual friendships, but when I use the word "friend", I'm talking about the half dozen or so closest people in my life. And other than sex, there's really not a difference between how those relationships and my relationships with "boyfriends". I have the same level of expectations, the same feelings of obligation. I actually would be more hurt if my long-time friends failed to come through in a crisis than if Dag did... we just have a longer tradition of showing up for each other in that way.
The other big puzzle piece is that I have a hard time defining "romance" and "falling in love". When I think romance, I think weddings

The stuff other people point to - NRE, butterflies, that feeling of needing to see someone constantly, or craving physical contact with them - I get that with friends, all the time. I just don't necessarily want sex with them.
(Like, I have crazy K cravings right now, and she is out of town for the second weekend in a row, and it sucks

I miss her energy, her vibe, her laugh, her hugs, her everything, I am like a junkie who needs a hit of my friend right now. It's the same way I miss Dag when I don't see him enough.)
Someone I saw only when the stars aligned would probably not feel like a FWB to me, because if they didn't prioritize me at all, I wouldn't consider them a real friend. Maybe I'd see that as a fuck buddy? Although, honestly, if I didn't feel like I could count on seeing someone regularly and knowing I was at least kinda important, I doubt I'd feel comfortable having sex with them anyway.