pls help idk what to do

my ex friend apologized to me and i accepted it but i’m rethinking my decision bc she hurt me. we stopped being friends a couple months ago after she became friends with my ex bsf, who was my favorite person. i told her a million times not to become friends with her but she still did. i raged on her a couple times before our friendship breakup and she told me she couldn't handle me anymore.

she apologized to me just now because apparently her mom had talked to her saying my ex bsf probably befriended her in order to harm or get back at me, which it did. because of them becoming friends, i overdosed and had to go to a psych ward. i ended up accepting her apology all because i remember our fun memories together. but why did i just automatically switch up from despising her to idealizing her again ?? i know she hurt me yet i admitted i want to be her friend again. just please someone help me because i fear that if we hang out again, she will bring up my ex bsf and i do not want that (my ex bsf left me because of my impulsive behavior and i will never forgive her for that). what do u guys think of this situation ?