Well, your profile says that you're male but still not sure if you're male or female. If you're an attractive female anyway and if he gets cold right after, I suppose it's a bad sign... I recall one of my friends telling me about a very attractive friend that she had who was in a relationship with a guy and that immediately after every encounter he would tell her that he needed alone time, leave her and not get in touch with her only until the next time he needed sex... the only thing that he had for her was a carnal attraction. She eventually did the right thing and cut ties with him.