My best friend of more than 10 years has been pulling back for a while. When I message her she doesn't reply but will message me when she wants to meet up. We used to see each other a lot but she has a lot on and I always seem to get bumped so that she can do something else (I need to see this person today, instead of you, because I have to do something else tomorrow when I would normally be seeing them etc etc). We still see each other fairly regularly (maybe once a month instead of once a week) I understand that she is my best friend but I am not her best friend. I've always explained it to myself as 'she is so busy and I'm lucky she makes the time for me that she does etc'. However then came lockdown - she's now working one morning a week (in a leave it all at the desk type job), she has adult children at home (late teen and mid 20's) so whilst life is hard I feel like the normal excuses not to message me have gone and I can't really con myself anymore that she's my best friend when I haven't heard from her in weeks. AIBU? Do I need to wind my neck in and cut her some slack, or do I need to move on?