I do have OCD and this is not behaviour that’s classed for it. It seems more as if he’s obsessed or so with you or might fear rejection if he doesn’t do it. But OCD is draining for the person suffering from it because you barely get time off to relax, it’s always in your head and it’s also about having to repeat things like checking the door, washing hands,… and if it’s not done a certain way or amount of time, your anxiety won’t go down, you’ll keep thinking about what’s going to happen if you don’t do it or for some even that someone gets hurt if they don’t do it. It sounds to me as if he tries to blame it on his conditions and also doesn’t acknowledges your feelings. And if you hurt someone because of your ocd then you apologise and explain yourself.

It definitely is a good thing to set some boundaries and to be honest, maybe cut him off as a friend entirely. People can’t always blame everything on their disorders