Most Helpful Guy
Well... it just depends on how well you explained it. I would be mad if it was just a random cancel , especially because I am type A. That said, if he understands the thought process and what your concerns were, he should be understanding and respectful of that. If you value the relationship, the thing you must avoid at all costs is making him feel like a child. A lot of a younger guy's self esteem is tied to his girl friend. If he feels like you are trying to be his Mom, he'll leave.
The question you need to ask is, was your origionAl assumption (that he is using you for sex) correct? The facebook message thing makes me think that you may have been right and he was using you. The key to keeping your relationships safe is to be firm in your decisions and bounderies. If you decide the relationship is going the wrong direction, LEAVE for GOOD.
Congradulations on getting out of your previous abusive relationship. It takes guts to make that jump, so good job and best wishes!