I don't understand

[Moonbaby]

[code][/code]

I have been experiencing some quite disturbing conversations within the past few months with men that have taken interest in me. Most of the men I have met have been from Myspace, some have been in person as well. They will either approach me or contact me through email and the conversation always starts off very respectful but eventually turns sexual. I do not feel that I mislead these men. I have been interested in one guy in particular. He was very nice and we seem to get along very well. Not long after our initial meeting on myspace we exchanged numbers and proceeded to text eachother. He started to be very forward and tell me things that he wanted to do to me sexually and in response I returned the sentiment because I was attracted to him and felt that he had the same feelings. Not too long after I played along he became very rude toward me. For example, he would only text me sexual comments and would proceed to tell me things about his activities with other women. I felt uncomfortable about this so I decided to express my discomfort and that is when he acted as if he was not interested in me at all from the start and now he no longer wants to talk to me.

Basically my problem is that this happens all of the time. A man will show interest in me and get me comfortable enough with the relationship and then I feel they do not want anything else to do with me unless it is sexual. What am I doing wrong?