Trouble enjoying sex

Kk

My boyfriend and I are very horny people. And recently I’ve gotten comfortable enough to tell him i haven’t really been enjoying when we have sex. Like I don’t feel anything good. It’s not painful. I just don’t feel much. But when he goes fast and hard that’s when I start to enjoy it. I feel bad cause he gets tired. I told him when he does that I feel amazing. Is this normal or is there something wrong with me?