Relationship advice?

Hey guys,

So I’ve been dating my current boyfriend for a little over 6 months. And he was the one I ended up losing my v card to. He’s a great guy and I truly enjoy being with him. But for the past few months after we’ve gotten past the pain and uncomfortable-mess of sex for me, we’ve been having sex way more often. It’s not a bad thing, I don’t discourage sex or anything. But most of the time I’m not in the mood, and I communicate that to him too. However, after a lot of no’s and “I don’t feel like it”, I finally give in and we have sex. This has started happening a lot more now too, to the point where he ended up trying to slip it in, while I was saying “no”. I don’t know how to feel about this whole situation. I want to talk to him about it, but I’m not sure what to say? Please help a girl out?