No life and feeling down

I don't know what to do and I feel rather stupid posting here. I've had dermatillomania since i was 8. No one understands it and i'm constantly told to just stop and find a new hobby. I pick almost all day every day. I don't need a mirror and when i get one the tweezers, needles, and blades come out. I'm depressed a lot and I've seen a lot of doctors about it. They all tell me it's not a real thing and it doesn't look that bad anyway. Well i'm covered in scars and scabs and infections and the stares seem to disagree. It's hard to get through the day. I have no friends and no life. I have a boyfriend but he has been telling me lately if i don't stop this he will have to dump me and kick me out. He has a daughter and he thinks my picking will hurt her. I keep telling him it's hard to just stop and i would never pick in front of her but he says he can't trust me not to hurt her and that he doesn't want to explain why i look like this. I would never hurt her and it could be passed off as bad acne. I don't know. He also tells me how embarrassing it is for him in public and that his friends think i'm ugly now. My whole family tells me how silly this is and that it makes them ashamed. I've been trying to stop my whole life and it's so hard. Long post sorry.