My husband and I made an agreement not to disclose how many partners we've had (thank god) because we feel all that matters now is that we are together.
I know its too late for you and that you already know, but I think it is unfair to make him feel bad for having a life before you!
Just think if something terrible happened to your boyfriend now, or you broke up, you would eventually move on and sleep with someone else. How would you feel if that person gave you a hard time??
And he said he cant stand that girl now, so there shouldnt be anything to be jealus about.
I say, lighten up and move on. Let the past stay in the past and quit bringing up a sore subject!