Sexual Frustration, do I have a valid point?

So no guy has ever made me cum, some get so close but then stop what they're doing even though I say keep going. So now with my boyfriend I always get him off and he says he really wants to get me off but when it comes down to it he warms me up, we have sex, and he gets to a point where he's about to go. Well I finish him off and then it's over... I always have to masterbate myself to get off. It almost makes me not really want to do anything sexual anymore because I don't get anything out of it. I like the connection I feel through it with my partner though. Is it right for me to feel this sexual frustration?