forgive and forget

Everyone says I should be more upset with Hannah, I am not though. Its more so that I cant trust her. I want to, but I cant. We haven’t talked in over a year now. Not really anyway. I miss her sometimes. This is being prompted by the fact that I saw her today. She was on the other side of the station while I was waiting for the train. She didn’t see me, and she was with some guy. I wanted to call out and say Hi, but I felt like I would be annoying her. She called me in February, to return my call from July, but I feel like if she really wants to talk to me, she would try calling again.
I shouldn’t make her do that though, But I’ve already given her so many chances, we have know each other since kindergarten though, we have been best friends since then, and I dont want to lose her because of phone politics.
So how many times can you forgive and forget before you have to cut that person lose? before they are just walking over you? I dont know. Maybe I should just call her one more time and see how it plays out.