Need some advise and to rant a little

So backstory, I’m moving really far away in a few days and not coming back

My best friend decides today to tell me she has been upset with me for a while about some things I do and choices I make,and that the way she feels about our friendship has changed. She now thinks our friendship sucks. I constantly have told her and brought up the fact that I’m a really easy person to talk to about things in a mature way. So I really don’t know what to do anymore