<human>: Hello!

I have been "officially" dating my current boyfriend for about 4 months, though we were casually dating for a long time before that.  He's recently (in the last couple of weeks), wanted more time alone than what I would call "usual".  He says he just needs time to be completely alone.  I understand that, because I am like that with most people.  But with him, I don't find that I need to be completely alone.  (But he wants to be alone, so that's a moot point).

Last night, we went to his fraternity together and he struck up a conversation with another girl who is an international student.  At around 10, I was tired and decided to go home.  I invited him to come along and he said he'd be by in a little bit.  I'm trying very hard not to be that clingy girlfriend and instead be cool.  So midnight rolls around and he texts me from the campus bar.  His raves about her in his texts and I humor him.  I fall asleep at around 12:30 and just woke up (it's 7:15 my time). I got a few texts from him at 2am along the lines of "My phone is going to die in an hour or two, so if we're still out when it dies, I'm going to sleep at my dorm".  I woke up alone, so presumably he was out until the wee hours of the morning with this other girl.

He doesn't have a great track record.  This is how our relationship started (when he was with his previous girlfriend, although I didn't know they were together at the time).

In addition, this summer he decided that he wasn't going to get blackout drunk any more.  We've been back at school for a few weeks and he's gotten blackout every weekend and never invites me to go out with him.  

I'm very anxious about our situation.  He is not, and never has been, open to talking about issues as he feels I'm just overthinking things and being possessive/obsessive.

Give me the gist of the text in a nutshell
<bot>: My BF ignored me last night in favor of another girl.  What do I do?  Am I justified in feeling hurt?