Ah, well if he's been cheated alot on in the past, then that could explain his insecurity. Also the fact that alot of guys (and girls! xP) would easily fancy you probably makes him even more insecure and jelous of other peoples attention towards you.
But bleh, it's not helping you, or helping to sort anything out, if he just keeps going on about the same thing. Blaming everything on you isn't nice either.
He probably keeps mentioning being hurt because he craves more reassurance and comfort from you - however he's not exactly going the right way about it. And like you said, you explained things to him, and you said you don't crave other guys comments etc.
Pssh, men!
If he's not going to co-operate, and continues to have a go at you, then just don't reply, as it must be really draining you :( you need a break! you haven't done anything wrong.