Need advice - calling off the wedding or not

Just know I am very heartbroken and never thought I would write this. My fiance and I have been together for a year and half. He used to be married (the marriage only lasted 8 months so it was like he never was.) He was 20 when he got married. Fast forward years later and he in a way reassured me he had healed from that relationship. Since the divorce, I have been his only serious relationship. Well a few times when we would argue he would say "you're acting just like her." The last time he said it was in Feb and when I threaten to call off the wedding, he begged for forgiveness.

Well last night he said it again. This time he added "out of all the women I've been with, you are the only one who acts like her." His ex cheated on him and was just mean. I've never cheated on him nor mistreat him. He has told me how different I am from other girls. But last night hurt me. Today he said he knows apologizing wont fix anything. He knows what he said was wrong. He was upset but that's no excuse. I dont know what to do. I still love him but I dont want her to even be mentioned at all. I told him hes scared to get married and needs to think about this. Like it wont be just me but with the next girl hes with. Itll be the same story. Hes scared I'll turn like her.
I know other couples are having WAY worst problem than me, but I dont know what to do. I always tried to stay away from divorced men for this reason, I just happen to fall for one lol. Hes a great guy. I can't complain about him. Just need advice.