Sex and tmi. HELP

So I have been having this problem where I'm horny, but not like super horny. I have been with my boyfriend for almost 3 years now and I am starting to feel like I've never really orgamsed. I mean, I feel the waves of the great feeling, but lots of women act like it's the best feeling ever. I don't get that and I don't know why. I feel like his fingers feel better than his groin. BUT, it hurts when he uses his fingers. Once it gets to the point of feeling good, I kindve make him stop because I feel like I have to. I don't know what's wrong with me, but I want to enjoy sex. Help!