How do I stop hurting myself?

I used to cut myself but I stopped when I saw how much it was affecting my boyfriend. I was suicidal a couple times but never did anything about it. Now I've resorted to finding other ways of hurting myself without sharp objects. I'll bite my lip until it bleeds to attach and alligator clip to my tongue just for the pain. I don't really know why I even do it anymore. It's almost like hurting myself has become and addiction. How do I stop?