Is he truly sorry for what he did?

Well about 5 months ago my ex and i started talking after almost a year of no contact, at all. He tried to "revisit" old memories, when i didn't want to. I've been in a relationship for over a year now, and on mine and my current bf's 1 year (we were at school at a football game) my ex decided that he was going push me against a wall and kiss/make-out with me. Well, i was not okay with this, but he kept going, and trying to do other things, i kept telling him to stop and that i wasn't going to kiss him back or get back with him because i'm happy in my current relationship, i finally managed to push him off of me (take into consideration that i'm 5'1 and 115 lbs. and he's 6'3 and 195 lbs. so that's a hard thing to do.) He ran off with his friends, and left me there crying and trying to clear my head. The next day he messaged me on Facebook (it was Saturday) and he asked me what had happened that night and when i told him he said that was sorry and that he was pretty messed up? that night. But, i stopped talking to him and last night he messaged me on Facebook and told me that he was extremely sorry for what happened, and he asked me why i just "dropped him like that". I guess what i'm wondering is if he really means it when he says he's sorry?