How can I get over my jealousy?

I have just started seeing this guy who I am really in to. I have never ever been treated right in previous relationships (with cheating and emotional abuse) which has left me paranoid and jealous. I want this relationship to be different as I am fed up with being in controlling and obsessive relationships. But I cant get over jealousy. I live in a small town and there are many girls who I get very jealous off, not because I think there amazing but because my ex cheated on me with them. If this guy talks to them I get really annoyed because I feel they are laughing at me. I do not want to try and control this guy in the slightest. I want to go out and not have to think about what he is up to and do not want jealousy to ruin this relationship. He is also going on a guys holiday which I am completely ok with. I trust that he wont cheat, but the thought of other girls flirting and that really annoys me! What can I do to overcome this? I don't want to talk to him about it because he has also just come out of a controlling relationship. I want to show him that it will be different.