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

My partner and I have been dating for just over a year and we are getting more serious.  But the more serious we get, the more he seems to get angry at me.

He has a bad temper (he admits this) and he often gets irrationally annoyed with me over all sorts of things.  He's under a lot of stress at work and it seems to spill over to getting angry at me a lot and we've been having a hard time this past month.

Today he got very annoyed with me over a misunderstanding and he called me a "fat bitch".  I don't know how to get past this because once several months ago he called me fat and stupid and we had a very long discussion about how badly that hurt me.  He said he'd never say that again.
<bot>: BF called me a fat bitch in a heated argument and I feel so hurt I'm not sure I can move past it.