How do you deal with an unsupporting partner?

Hello. I have never posted here before. I have never felt the need to talk to anybody about this or really even knew other people suffered from it. I have picked at myself badly since i was a small child. Sometimes its not so bad but lately it is. My partner hates that i do this constantly. It is understandable but at the same time i feel like he dosnt need to tell me i am gross and gives me dirty looks etc. I feel embarrassed enough as it. I feel like he thinks im just doing it because i want to and not because i need to. I have tried talking to him about why i do it and how i dont even realise im doing it most of the time. I feel very alone and hurt when he does it. I dont know if i am being unrealistic in hoping one day someone could help you instead of judge you?