Cheating

So my boyfriends at uni and he's having a lot of issues lately but he went out with all his friends both guys and girls and he apparently blanked out was a mess and all over people and according to other people it seemed like he was trying to get with two of his flatmates. He admitted this to be last night and has been begging like in the floor crying begging that he never wanted it he doesn't want to lose me and that he will work for as long as it takes to prove it to me. But I don't know what I should do because the only thing that's running through my mind is him trying to kiss another girl. Any suggestions on what to do cos I love him so much and I genuinely does feel sorry for his actions and I know it could have been a lot worse