I am 23 yrs old. My boyfriend and I are in a relationship for 7 yrs. My boyfriend went to abroad for higher studies. It has been 2 and half years. He doesn't have any idea about his return. We used to have lot of sex before he went there. We used to have sex talk. But from 4 to 5 months even though he brings it up I am changing the topic. I don't know what happened to me. I just gradually lost interest in it. I don't masturbate. We are loyal to each other. I love him a lot. He asked me yesterday about it and I explained everything to him. He was upset and he understood me. He told me that he won't bring that topic again if I am not interested in it. I am hurting him a lot. Will everything return back to normal if he comes back to me? What happened to me?