Advice Needed:

First off, I need judgement free advice. I am 22, and in April I had my first time. I was 21 and he was 18. A month or so later, my first told me I was a mistake. Now, we are back in communicating terms. He wants me to give him another chance, he says he can prove himself to me, but I’m on the fence. I mean we have a bond since he was my first. What should I do? Should I just try to be friends or go in for the kill and be more? If not, tell me your honest opinions.