I was with a person like this and we would normally have sex twice a day. It was usually fine but when he would be whiny about it, it was annoying. We all want to fuck, stop acting like you're going to die if you don't get off multiple times a day. Oh, and he would go to work really early (4 am) and would wake me up which I didn't mind but then he would want me to give him oral, get on top, etc. and I would end up completely waking up. Eventually I just told him that he could wake me up but not to ask for extras or talk to me too much. During our relationship I did keep in mind his high sex drive because I cared about him (and honestly the fact that he wanted me 24/7 was a turn on) but every once in a while it would be a burden on me. We were only together a little over a year and a half, so maybe if it was a longer relationship it would have been harder to maintain. And I did always have it in the back of my mind that if I ever couldn't fuck him for some reason (like an accident or something) that he would leave me or cheat, which was a shitty feeling. Good luck. Just remember that the world doesn't revolve around sex. It's an amazing plus, but it's not the only thing that matters.