perhaps if you sat down and shared some of your worries with him? just let him know how much his behaviours worry you and maybe even make a compromise with him to go with him to counseling or something for a few sessions (set a number) and if he really feels like he is receiving no benefit from it, then offer to put your concerns aside for him. even if he does not want to admit that he has a problem, perhaps his love for you will prompt him to see how much this bothers you and to seek help for it.
i am not really sure how to help, since i've never really had this problem myself. what i do know though, is that his healing will have to take place in its own time. if he is to get help or address his problems it will have to be on his time....and i know that is not much comfort. pushing the issue is likely only to create a rift between the two of you and make it even less likely that he will seek help. just be as supportive as you can, try to be understanding of his obsessions and compulsions... be there for him and perhaps he will begin to understand how worried you are about him. it's worth a shot. best of luck to you... PM me if you ever want to talk.
-shadow