<human>: My boyfriend and I have been together for a little over a month. We were previously together for about a year, but then broken up for 8 months due to him sort of "cyber" cheating on me (sending/receiving pictures, telling a girl he never met that he loved her, immature shit like that). I know that the same issues will most likely arise again getting back together with a past cheater. 

He jokingly said to me "I hope we're together for a long time, as long as you aren't bitchy". I then said "I hope we are too, as long as you don't cheat on me". I thought we were just kidding around, beating up on each other. Then he says "Yeah, but old habits die hard". At this point I freeze and basically come out of my drunken state, asking him what the hell he meant.

He said he just said that because he wanted praise for being "so strong" and resisting urges. Wtf? Is it not a boyfriends job to be loyal to his partner? He knew I was upset, so we went to bed with him kissing my ass and telling me all of this "I'd never cheat on you again" stuff. 

So what now? I'm super paranoid all over again of him cheating on me by that comment alone. Should I end things since he pretty much said himself that he'd do it again? Or should I bring it back up and try to work on things?

Could you distill the essence of the text into 1-3 sentences?
<bot>: Boyfriend drunkenly said "old habits die hard" in reference to previously cheating on me. I'm worried about our relationship now. Should I break up with him over that?