I discovered I had OCD when I was with my wife (then my girlfriend), so I've had someone to talk to about it for many years. Close friends know about it too (when I have close friends, which is rare). It is extremely helpful to have a support group...and yes, finding the humour in your obsessions can be a great help.

I do have to chip in my support for therapy, though...as long as you find the right person. I swear, with my psych/therapist I spent most of our sessions talking about all the problems in the world. Just talking, you know? We'd let the coversation run wherever it did. He would ask me a lot about my family, and it was nice to have someone to talk about them with...he helped me see how my environment growing up contributed so much to my issues.