Mixed signals from boyfriend (and please don't answer if you don't have anything nice to say, I'll report u),?

My boyfriend of many years is starting to send me non specious mixed signals. Here's the thing: in the past few years I have gained weight (hormones from stupid birth control shot) that makes me not attractive anymore. Yet, we still have and . For example a few nights ago, I was in his room and we started making out and one thing lead to another. Then last night we were snuggling and he started getting all touchy with me and he turned me on and I had to go and he hated it. I guess what I am trying to ask is; Why does he say that he isn't attracted to me but then he loves it when he turns me on and loves those moments that we have