here's the thing. You cut yourself, because you are very low in your self-esteem. I give full credit for this "mitch" guy for being there for you and he seems like he's caring enough. Your confusion is normal. Anyone would be after a breakup. Your first step though is to get yourself back together. What I mean is before you decide to get into this seriously, make sure that you don't ever get into a situation where you would cut yourself again. I would normally say that you need help, because that's not healthy. Don't ever feel like you should have to take your life, because of someone else. You are better than that.

Anyways, your ex is your ex for a reason. If he goes around threatening to tell people about this then he's LOW. He has to find himself a new way to get a life than to purposely try to hurt you. That being said, who cares what others think? So you lose a bit of reputation. It's times like these where you truly get to figure out who your real friends are. Those that stick with you regardless of what he says will be there for you. I'm unsure how old you are. Whether you're in highschool or not, but remember that you will graduate and I'm sure if this guy goes around telling people this, they'll probably think he is a complete "jerk" as you mentioned and he may be better off now, but if you keep your cool and not show him you're upset, you will be better off in the long run. Ultimately what we do now affects our life in the future.

I think your best bet is to continue to see this "mitch" guy if you really like him. Your ex has got to grow up. I have a feeling everyone will agree with me if I say that you'd be the better person if you didn't retaliate to this. Just play it off like it doesn't bother you. If he DOESN'T get a reaction from you, then he'll stop. It's the way the game is played. This is what I have to offer for now. Good luck.

Cdoc