Should I reach out again

One of my ex-friends and I had broken off a while ago. I was originally really devastated but at this point I’ve already accepted it since it is what it is.

Recently, they’ve reached out again, to talk. I just don’t see the point, and to be honest I’m a little uncomfortable and I don’t want to rekindle anything. I’ve already detached them from my life.

One of my other friends is helping out for us to communicate apparently (which is really sweet) but I just don’t feel comfortable to talk again.

I’m not really sure if I should say anything back or just ignore it