Rant time

So I had a boyfriend and I really loved him and we stayed on really good terms after we broke up (if i’m honest it was kinda weird) then the other day he started talking to me more and more and now he told me he likes me again and i’ve let him down nicely but i still feel like shit. The boy i really like is a really nice person and everything but sometimes he can be insensitive and really nasty and i don’t know how to deal with it because I really REALLY like him. So now that this really nice guy has told me he likes me and i know i would be safe with him i just don’t feel right.