I(23F) am dating my ex-friend’s ex-boyfriend(23M)

I was friends with A (23F) since high school. Even though I knew him through her and i was unsure of their relationship status, our friendships were always separate. We never hung out as a trio, except during her birthday— I spent time with A in person, and I spent a lot of time gaming and hanging out with M in a different friend group. I genuinely felt like I knew each of them individually.

When A and M started dating, I kind of foresaw it and I continued to be just friends with both of them in separate ways.

But after their breakup, A told both me and M that she didn’t want us talking anymore. I can actually understand why she felt that way — and felt that her feelings were valid as I was closer to A than M.

However, her request basically ended things between all of us. We all drifted apart after that as things got messy.

Fast forward two years.

I randomly ran into M at an event. We talked a bit, then started reconnecting more, and eventually… we started dating.

Now I’m wanting advice about my situation for dating him even though A and I aren’t friends anymore?

tl;dr: i used to be friends with a girl (A) who dated a guy (M) I was also friends with separately. After their breakup she told us not to talk anymore, and we all drifted apart because it got messy. Two years later, after the friendship ended and their breakup was long over, I reconnected with M by chance and we started dating.