I Guess I Don't Cum???? Help!!!!!!

So I've had sex in the past & I literally could not cum or even get close. Once. Only once have I even felt like I was getting to the point where it could be close to that time. & that was from oral. Me and my boyfriend literally have sex at least twice a day and everytime he asks me did I cum? & I say I don't know. The pleasure is amazing and I get so wet but I don't think I ever cum. Even during intercourse , I rub my clit or he would and I get to the point where I feel like I should cum or should've been came. Like, I feel like I could pass out at any point but....... Sadly, nothing. Sorry if this is too personal. But, any advice ??????