<human>: Can you condense the text into three sentences or less?

Okay so this needs some back story: my boyfriend and I have been together for roughly 4 years. We started dating in high school when I was 14 and he was 15. About one year in to our relationship his ex-girlfriend comes back on the scene, they start talking, I'm friends with the girl, nothing is thought of it.
Basically, this girl makes both our lives a living hell and manages to break us up, convince him to go back with her and leave me;  just be an awful person.

Fast forward to today; he has a female friend, lets call her Sally. 
They talk a lot on facebook and are generally good friends but we don't get along, simply because our personalities and interests don't match up, nothing against her. 

Since the long drawn out awful event with said ex girlfriend two years ago I have a VERY hard time trusting other girls, I am fully convinced that one of them is going to pull an ex girlfriend shenanigan and cause me to lose him even though I know this is completely irrational thinking.

I know that he loves me and I don't think he's cheating with Sally, but I do not know how to get over this crippling irrational anxiety or talk to him about Sally without sounding controlling or overbearing. Any advice would be lovely as I don't want to put strain on a stable relationship.
<bot>: crazy ex girlfriend of current boyfriend makes me wary of other girls, don't know how to tell boyfriend his female friend makes me uncomfortable with out sounding controlling.