Why does he do this? What can I do?

I am a virgo female who wants a scorpio male. When we first started talking the conversation was very interactive. We had a discussion about sex and I made it very clear that I didnt see myself rushing into a relationship, let alone a sexual relationship. He said that sex was not the most important thing however, he didnt see himself having a woman because he didnt know how long he would be residing in the state in which we live. I respect that. I have noticed a change in recent behavoir. I feel he is trying to pull from me. I am not trying to do anything to hurt him or make him feel uneasy. Some examples:

1.I have asked him some personal questions and he has answered all. Some of the questions...he acts as though it pains him to answer and they are not even the major conflict questions.

2.After a night of touching, kissing, cuddling, talking and all of that good stuff... I looked him in the eyes and he suddenly had a headache. He went to the other side of the bed to lay down. I went to lay next to him and we talked again. He sat up at the edge of the bed. I sat in back of him and pulled him towards me and he laid on my chest. I started rubbing him and he jumps up and moves to the other side of the bed and tells me he is not feeling well.

We haven't been talking as much as we used to. He hasnt been calling as much as he used to and I dont want to make myself too available by calling too often. He recently told me that "everything is good...I am just busy."

I want him to feel comfortable with me or as comfortable as he was before. I am confused about what is going on. What can I do?

I think he already told you, he doesn't want to get too involved if he may be moving. He may feel that you are 'teasing' him or toying with his affections. Scorpio's like to be in control and he may feel uncomfortable if he doesn't know what the future holds for him and/or you.