<human>: We're both 25 and have been together for seven months.  Last night, he had a guys night and I had a girls night.

Come to find out, he and his buddies went over to a girl friend's house to play poker and hang out.  He was drunk so instead of driving home, he stayed the night there on the couch.  I told him he could've called me and I would've picked him up but he said he didn't want to "be a burden."  

The girl is also very pretty and I'm not a fan of hers.  I've seen the way she looks/acts around my boyfriend and it makes me uncomfortable.  He doesn't know how upset I am.  Should I tell him?  I don't want him to think I'm a controlling girlfriend.

Can you provide a brief overview of the text?
<bot>: I'm (F25) mad because my boyfriend (M25) stayed the night at a girl friend's house.  Do I have the right to be upset with him?