To date or Not?

Little backstory, me and this guy have been friends since 2016 but back then I was dating a guy (my ex bd) and my friend was dating my ex’s niece. Him and her had a child together and my ex and I also got pregnant and had a child together. My friend and his gf broke up and my ex and I also broke up. My sons donor hasn’t been around since he was 2 1/2, doesn’t see him, check on him, ask about him or anything, nor does that side of his family though I’ve tried to keep them involved. Anyways me and my friend have continued to talk over the last couple years and over time we’ve both developed feelings for each other (he knows everything i went through with my ex, he was physically and verbally abusive and I know everything about him ex and what they went through). We’ve always been there for each other, always been close, literally like best friends. I guess what I’m wondering is would it be weird for us to “talk” or even date since ours children are technically related by blood? Please no judgment