As someone who has been friends with multiple exes, in the long run, it doesn’t work out. It’s doable, definitely. But at some point, it will drastically change or end.
Look, staying friends with exes, for some people, is commonplace and is a sign of “maturity”. I learned it’s not. This is an opinion based off my experiences and biases, so you don’t have to agree with me on this.
From my personal experience, I wasn’t able to take relationships seriously and some of my partners couldn’t take me seriously because I remained friends with my exes. I wasn’t able to compromise with certain partners with cutting off contact with certain exes because of my friendship with them. It’s something I had to learn with experience and time.
For the time being, I don’t see an issue with remaining friends with an ex. As you start branching out to date again, you just need to recognize the fact that your friendship with that ex might eventually cause contention with your future partner.