Is my boyfriend losing interest in me?

I am dating my boyfriend from last two years. we met through facebook in the initial stage of our relationship we were in long distance. we used to Skype everyday.. almost every day we used to do naughty stuff on video chat. i know the problem is little weird but please bear with me. Whenever we used to talk on phone we used to do sex chat. It lasted for 4 months. After 4 months we met for the first time..we started meeting in person. On every weekend we used to sleep with each other.. this thing lasted for 8-9 months. after that we again got into the long distance. Now the problem is .. he is not interested in virtual sex. He says.. we had already done everything in person.. now it feels weird talking about these stuff on phone or video. these things doesn't turn me on. But whenever we meet.. we do all these stuff.. do you think its normal... or Is my boyfriend is losing interest in me ? He calls me every day.. he talks about future but i think he is not physically attracted towards me any more. I lost lots of weight in last one year. My height is 5'3 but weight is only 40 kg.. so basically i am underweight .when we were friends once he told me that he has a thing for curvy women basically chubby girls. He never ask me for my pictures. Day by day i am getting insecure about myself.. i am losing confidence in my self please help me out.

Why did you revert after 9 months to long distance? Who's idea was that? YES, he's losing interest. He didn't mind doing the virtual thing as a way to take him to the real thing, but he doesn't want the relationship, or any aspect of it, let alone what I call Plugging-in, to go BACKWARDS. Would you?...if this were a job promising, say, a secretarial/PA position after 4 months of being in the typing pool?....go back after 5 months to typing pool typist and be happy about it? Again - whose idea?

Sorry - losing interest in virtual sex, not you.