Does anyone else have this problem?

When my man and I first got together, he would get so hot from just looking at my body or touching eachother in a sexual matter. We'd always be around eachother 60% having sex  40% just hanging out together, learning new things about eachother. I've know the guy since I was 14(I'm 20 now, he's 22) I was a virgin and he ate me out, but nothing further. Here it is we got together when I was 16,  everything was so hot and heavy I moved back home came back when I turned 18 and again everything was still fresh and now I don't know what happend...sometimes I feel like he could care less if I changed in front of him or if we're having sex or not. He'd rather just hang with me. Maybe I just want the whole cake?