Less sexual

Okay, so I've been with my boyfriend for about a month and a bit and I was seeing him for about three months.. To begin with he was really sexual but as the months gone on he's telling me that he doesn't want to do things as much because "I don't start the foreplay" when I do? And it made me feel a bit shit like I don't please him like I thought I did.. It really confuses me because he's saying that he doesn't want to do anything because of it.. Is he less attracted to me?