He does not seem like a very nice person

The fact that he called you up to tell you that he was seeing something appears to me that he is trying to prove something to himself.. Prehaps he feels that he could not help you therefore he may have felt in a sense "useless" from what I have read males tend to like to fix things it is a way of proving masculinity (This is mostly an unconscious type thing. men don't go around saying I am going to fix this because it will make me feel like a man) by seeing someone new he may unconsciously be trying to prove that he is a man because it gives him someone he can try to help. This is just my opinion though.... Either way I am sorry that you had to deal with it