Hi Penelopie it sounds like your boyfriend is depressed but looking in the wrong place for a solution. He needs to know that help is available in the form of therapy and treatment that can help him with his depression other than going back and looking at old pictures which isn't healthy and isn't working. He has to want to do this though. Personally I think it is OK if he won't talk to you about it but he has to talk about it to someone and that's what a trained professional is for. Eventually he will have to trust you enough to be open about it if he wants a relationship with you but before that happens he has to trust in someone who can provide some real help to him.

Are you able to guide him toward finding a therapist, convince him to seek help for the pain?