Sure, I also posted in Friendships & Dating, but happy to say more here.
More info, ok. (Feel free to move thread if more appropriate elsewhere.)
I've been in a mostly mono/poly relationship for the past two years. It's my first poly relationship and for the most part has been a positive experience (I'm the mostly mono and I say mostly because I have only dated one other person for a very short time a little over a year ago). Though we haven't been big on labels, it's easiest to say that my partner had another primary and a family with that primary. I, for the most part, have been the secondary. However recently the dynamic has shifted. They no longer live together and now each of us lives alone. I have become the primary as my partner's relationship with their other partner is in transition. They have a family together and are working through what their relationship with each other and with the kids will look like.
I'm happy being mono as I don't have a strong desire to date other people. However it comes with challenges that I'm sure are not unfamiliar here. Jealousy, insecurity, etc. I also sometimes struggle with the family dynamic between my partner and his other partner - feeling excluded, etc. And some of the other typical feelings in poly.
One of the biggest things is that, being new to poly, I sometimes don't know what I should be asking/demanding of my partner. I struggle with figuring out boundaries for some things like communication (what must be communicated vs what is discretionary).
Again, I'd love to find some folks to chat with online or in person (Colorado) to bounce ideas, talk about things like boundaries, what works, what doesn't work. Though my friends are accepting of the lifestyle and are friendly with my partner, they don't fully understand and often can't offer constructive feedback.
Thank you all and I look forward to great conversations on here.
