So my penis is kinda small: 5inches length and 4.3inches girth. My girlfriend's pussy is kinda loose, I can fit in 3 fingers no problem. Today we fucked and I fucked her furiously for like an hour and I didnt even cum. After the sex she lied on top of me and started grinding me to get off. This makes me sad and even tho I like her a lot we might be sexually incompatible so I'm thinking about leaving her. My question is: is it possible that she doesnt even feel me? She was moaning and sometimes screaming during the sex but I'm almost sure she was faking it.