Please help I don't know what to do

I suffer with depression and anxiety and I used to cut every day. I'm really worried about my boyfriend, a few days ago I saw he had been cutting (he said he's never done it before and he was just trying to see what the pleasure is from it). So I told him to never do it again even if he feels he has to. Well just now I saw his thighs, he has cut them both up entirely.... I don't know what to do this time he wasn't just trying it... Something made him do this... But when I ask him he just apologised continuously. Somebody please help me... I'm worried about him...