I have a friend who lives in a different city and we grew very close during covid. She is defacto my best friend simply because she knows what I am going through, as she has some experience in that matter.

Lately, she is pushing me away. I think she does this because she needs space, as she says, but also because she thinks our friendship is going to part once covid is over. Third reason, because she is in love with someone she associates with me and she is trying to get away from him (which is difficult when we are close).

What I mean to say is that mistrust is not making things easier for me to stay best friends with her. Of course the distance is an issue and of course if we don't spend 3D time together, this is not helpful, but her constatly telling me that I will leave her isn't really making it super nice for me to stay, as it is constantly a strugle to get her to trust me.

I do get it, I am not big on trust either, but this dynamic might be something to keep in mind.