What should i do??

So I have a fb where we only have sex, no hanging out or getting to know each other type of situation. We've been having sex consistently for 3 weeks now. He feel asleep in my bed a couple of times and when he does he cuddles with me. A week ago we somehow ended up hanging out and I think we've both caught feelings for each other. He's a really nice person but I can't do relationships right now. What do i do??? I'm having like mixed emotions right now.