SUBREDDIT: r/relationships
TITLE: My (25F) Boyfriend (30 M) admitted he's had sex with me when he doesn't really want to, and now I'm afraid to initiate.
POST: My boyfriend and I have been together for 2 years, moved in for 4 months. Everything is fine other than this issue. My sex drive is higher than his, i could easily have sex 5 or 6 days a week. This is how it was when we first started dating and I loved it. I felt very confident sexually. One day he admitted to me that sometimes, when he was tired or not in the mood, he had sex just to please me. I was shocked and sad, I thought he liked to have sex with me. I felt like some kind of pushy rapist. 

This pretty much destroyed my confidence with initiating sex. I'm always afraid that maybe this is a time when he doesn't really want to do it. Sometimes when I'm having sex with him, it crosses my mind, what if he doesn't really want this? 

Now we have sex like 2 or 3 times a week. It kind of sucks because I feel like I have to take the chances to have sex whenever I can get them rather than have any say in it. So I'm stuck between having to worry about the chance that he's just doing to humor me, or only do it when he wants. 

I don't know how to bring this up to him. He seemed to think it wasn't a big deal that he was doing this, and didn't understand how it made me feel so bad. I feel like he's going to evade if I try to talk to him about it. I don't even know what I'm asking for here. I miss being able to happily and confidently initiate sex without wondering if he was just doing it because he felt obligated. I miss having enough sex.
TL;DR: 
BF has a lower libido than me and told me that sometimes when we were having sex, he was doing it just to please me. We now have less sex and I'm no longer confident initiating.