I got out of my first relationship about a month ago. I don’t think I’m over him, but I have made my peace with the breakup. We were together 4 years so I know it may take a while to get over him but how do I know that I am???

I know I’m not yet because I know seeing him would be really really hard if I had to, am I over him when I think I’d be able to see him? Or is it when I no longer think of him? Do I have to be able to picture him with someone else??? I have no idea ...