my partner (20M) and I (20M) have been together for a year and a half. about 4ish months ago he asked me if I would be interested in poly. I agreed, despite not being 100% with it at the time. After a month or so we found someone who I wasn't particularly interested in but my boyfriend is. I on the other hand, have been monogamous until about 1-2 months ago, and technically still am. I started falling for another guy (also 20M). My bf said he's fine with me and him kissing, handholding, etc. but he's not comfortable with anything more than that. about 2 nights ago me and the other guy were hanging out and just shooting the shit when I got a message from my bf saying that he isn't comfortable with us kissing anymore, and that he isn't comfortable with us staying up late together. I spend most nights with my bf, and only 1 or 2 nights weekly with this other guy (still going to bed with my bf, just hanging out with this guy).

I'm just confused. my bf doesn't hold anything against the other guy, suggested we go poly, has another person he's currently talking to, and I still spend the majority of my time with him because he's my primary, but for some reason he's been really weird about me and this other guy?

just looking for advice. I'd really like to stay with both, but my bf isn't good at talking about what the issue is, and whenever I bring it up we just cuddle in silence while I wait on an answer.

TLDR: My bf suggested we go poly, and is currently talking to someone. I started getting close to another guy (my bf said kissing/cuddling is on the table), but as of just recently, my bf told me to stop spending time with him. He won't say exactly why, and idk how to talk about it with him because he gets really quiet.