While it is a wonderful thing that you care so much for this man that you want to "help him work through" his issues, lovely, you are his girlfriend, not a counsellor. You are too closely involved to be of any help at all, sadly. If he really wanted to face up to his issues, he would do that himself, with professional help. These kind of guys never do though. They think counselling is a load of rubbish, doesn't work, too expensive/they don't have time, or that it's for "crazy people".
I can predict also that he says things like "It's not you I don't trust, it's other men," "I trust you, but not when you're drunk," thinks it's acceptable to seek revenge on men who his girlfriends have cheated on him with, insists that all (or 90%) of his exes have cheated on him (Possible, but unlikely. More likely he thinks they did.) And he hates cheating with every fibre of his being and would never ever do it. (Hate to say this, but someone who is that certain, and that fanatically opposed, usually has a guilty conscience.)
Plus SirSugar is spot on - he's projecting. Most men don't think about women like this at all. Some do, yes. The fact he thinks they all do probably means he also thinks like this. Including about you. That is a hard thing to realise. I remember when I had a conversation like this with XP and he said "Well no, I wouldn't have ever bothered talking to you if I didn't fancy you." I always saw him as a friend, turns out he never saw me as one. Women were a completely different category. I never ever felt so lonely as I did that night. :( (Happy ending though - I'm now living with a man who I'd count as one of my best friends and I know he considers me the same :))