There are some meds that can help address OCD, therapy can help too. The very best thing, is that he gets an evaluation and then take it from there. . .this will help give you a break in time.
Another good idea, is try to go with him at therapy if allowed, working together can have a better chance of working more effectivly (sp?) can also help educate you on his problem.
Some OCD is not bad if it is mild, and no big deal if it involves a certain routine a person follows.
Oh so often, people loosely use the term OCD today, so again I'd suggest an evaluation by a mental health professional.

I wish you both lots of luck with this.

DE