low sex drive

Before my boyfriend and I got in a relationship I had a very high sex drive. I could have sex multiple times a day all week long. But now it feels like a chore. Like when is this gonna be over type of feeling. I'm in love with him and I find him so attractive but I just don't have a sex drive with him. Do you think it's because he's not very good? How could I make sex better without offending him since he is sensitive? I just want to be able to please his high sex drive