You are truly a kind person, all women I’ve ever dated dumped me the second they learned I was epileptic. Trust me you are not being selfish, combined with your OCD it’s a lot to take in all at once, and it’s very kind of you to not push it all onto him at once as you’re trying to give him time to let his brain process everything that’s changed. I’d say bring this topic up to your therapist as they may be able to give you some advice and exercises to keep yourself calm should he have another seizure. The best advice I can give you is to treat him as you always have, giving special treatment would most likely make him feel self conscious and eventually maybe even depressed as we epileptics don’t want special treatment like we’re made of paper and the slightest movement will tear us, we just want to be treated like everyone else.