As much as i'm taking in the consideration of the others, i have to agree with vagabond to the fact that there are many people out there with the same problem and something can be done to help.
I've tried looking the net for souceful info and the two things that i've come up with is a very successful book to do with changing your jealousy and possession, and also "Metta Meditating". *It's going to be very hard to address something like these as the person that he is, he may feel even weaker than what he is.
Sometimes i wish i could just ring his ex gf's neck for causing a lot of this, as well as the ungrateful b*tches his best mates went out with who also cheated. *Why is this world turning to cheating?
? It not only makes us think twice about "trusting" someone, but it makes us feel insecure with ourselves, thinking we're not "good enough" or something.
I do love him, and no i am not scared of him. *There's no holding back on who i go out with, but seeing him hurt makes me hurt. He doesn't have to talk to let me know how he feels, i just look at him and know exactly what he's thinking.