My Therapy Couch

I have known for a while that I have what is called dermatophagia (skin biting) & dermatillomania (skin picking). I have done it for as long as I can remember. I have tried stopping on my own but my will power never seems to be strong enough. I am tired of feeling the need to do it. I dont feel I get any enjoyment from it since at times it gets so bad that my fingers constantly sting. I would like to work on this problem but its embarrassing and I think most people would find it disgusting. I have told my boyfriend about it over a year into the relationship and when he catches me he tells me to stop which can sometimes help but most of the time it doesn't do much good. Are there other people on here that have managed to break the problem? I could use advice and tips.