a girl that you once had one-itis on but you have mostly moved on from texts you saying "just wanted to say hi. I'm really sad"?

As a friend, I guess I want to listen to her problems and be the friendzoned dude who always listens to his female friends' problems.

as a male though, I've already kind of moved on from her (still in process of), and I feel like this getting involved in this is something that's eventually going to make me feel like a b*tch before. I've been involved in her drama before.

I do want to keep her as a friend ...what to do?