<human>: Can you condense the text into three sentences or less?

My boyfriend (M22) and I (F24) are a weird situation where because we were good friends while single, we ended up being roommates in a 4-bedroom house. Two months after moving in, we were dating. We've been dating for about 4 months now. So far, this has actually been great and we haven't had much for problems except:

Even before we started dating, he always invited me to any event with "the guys". I've been friends with all of his friends for a while and I like hanging out with everyone. Recently though, I've found that once-a-week, he wants to hang out and get drunk with all of them... without me. I get that people need space sometimes and want to hang out on their own, but I really considered these people OUR friends. It makes me jealous to know that he's out having a great time while I'm at home, uninvited to join. I would invite him to any type of group situation and it hurts me that he wouldn't do the same.

Is it reasonable for me to feel jealous and a little unwanted, or does he need extra space because we live together and see each other so often?

(In the times I've tried talking to him about it, he says he just wants "a night out with the guys". When he comes home, though, I usually hear that he was at a party with 10+ people [guys+girls], or that everyone else's girlfriends showed up, etc.)
<bot>: Boyfriend won't invite me to group events with his friends anymore. I don't know whether I'm overreacting by feeling jealous or not.