This guy is critical...what do I do?

I think you should talk to him and tell him how much his behaviour is upsettig you. I understand how frustrating OCD can be; I have it myself- i constantly wash my hands, have to check things various times and i overthink things so much to the point it drives me insane. i know many other people who had OCD, all in different forms for instance my mother has OCD about cleaning and tidiness and it pisses me off so much!! I think everyone has OCD, but in different forms. I think you should talk to him, tell him how upset you are and maybe suggest he go to cognitive behavioural therapy for his OCD, I havent tried it, but I hear it helps. If you guys love each other you'll work it out. All the best xx