Is It Okay To Move On??

My ex and I split up 5months ago, I had just had our baby, when i found out he was cheating. Even then, I wanted to work things out. But he wasn't paying any attention to me or our relationship anymore. I found out the woman was married, and I called her husband. Even then they still pursued their affair, while my ex still had me around, but didn't want to get back. Something awful happened to the woman's husband, Looks like my ex and her are still together.. Even then I tried to talk to him, for us to work things out. But he tells me that he's confused, and doesn't know what he wants. But to me seems like he does, the other woman. Yet he still asks or tells me about how people tell him about my whereabouts, or even stalks my Facebook.. Anyway, I just want to know, is it too soon to move on? I'm talking to this guy, who I knew waayy before my ex. I never thought of us being together back then. But he came into my life now, and he's been great. He knows about my baby, and always wants to include her for everything. For example, if I can't go out because it's not my ex weekend, then he'll tell me to bring her along, which I have not due to, not just wanting to bring anyone around her. But I have met his kids, and they seem to like me. I just don't want my ex to portray me as a "Hoe" if he sees that I have this new man.