i'm genuinely confuse on how people act.. idek what to do

i'm genuinely confuse on how people act.. idek what to do...

i have been making plans with a friend of mine but it never happens because our schedule doesn't align. these past few weeks, i've been seeing her posts about ppl not really gaf about her and nobody's reaching out to her.. altho i'm the one who's not getting response from her.

i called her one time and she sounds so bored and wants to hang up. she always sound bored with my calls, her replies whenever i chat her (i always initiate it cus she wouldn't) were always her being passive aggressive like her saying "it's always her fault" or "so you hate me?" and it's always unrelated on my chats. she also posted about ppl being inconsiderate because they don't care enough. i'm seeing a pattern on her behavior that she told me about. she told me that she counts whenever ppl do something she dislikes till it's on limit. she cut off someone because of that and after that, i feel like i'm walking on egg shells whenever i'm with her because she always do the passive aggressive response and i flinches inside whenever, now even with chats.

i don't really wanna lose her as a friend but it's been suffocating and confusing. i wanna confront her but i wanna find more reasons and see if i'm not imagining things.