You should try to figure out if he means it, and make him prove that he does and that you can trust him again. And unless your break up had nothing to do with trust issues or anything like that, under no circumstances do you get back with him until he's proved himself.
Try to remember what it was that made you guys exes. And it's not as important what he says but what he did, and how you feel. So he says he loves you, well that doesn't mean you have to believe him, or love him.
Your kids for crying out loud, get over him once and for all. If you can't, then get back together and see if he's any different the 2nd time around. It sounds like your both to young for anything serious so lighten up and live a little, have fun and surround yourself with people that make you laugh and have a good time! Wish you only the best!