Feeling unwanted

I just want to vent a little here.

I have being dating my boyfriend for half a year now and we get along great, I really do love him a lot and we spend a lot of time together. The thing is that I am a very sexual person and at the beginning I felt like we wanted each other in the same level, same intensity, but lately I feel like he just has sex with me to please me, not because he really wants to. This makes me feel unwanted and that I am some how abusing him (?)

Idk I'm just sad.