Is she meant to be in my life?

Growing up I was always taught the saying some people are only in your life for a season.

I had a friend, more like a sister. I trusted her above everyone else, she made me a better person in every sense of the word.

I hooked up with her ex twice. The first time she let it go, but the second time she didn’t. I know I have no excuse what I did was wrong. I apologized. It’s been over 2 years since we cut ties.

On occasion I find myself thinking about trying to make amends. We talk (rarely), I really don’t know what to do. Should I let her just live herself and try move on with mine? Or should I try to get back some of what we had?