How to cut someone off

Recently I’ve started seeing a therapist because Ive started getting these debilitating panic attacks and I’m overthinking everything in my life and my mental health has gotten so bad in the last few months. In one of the sessions, we talked about my lack of boundaries and people-pleasing problem and the topic off my friend came up.

I’m in college 22F and me and my friend have been close for the last two years or so but lately I’ve started to question everything. She constantly makes me feel bad about myself and I wonder all the time why we’re friends. Just a few examples: whenever we meet she’s always late and has stood me up more than once (I’ve waited for her over two hours for her not to show), she’s abandoned me on nights out before, whenever we’re together it feels like it’s just an inconvenience for her and is always talking about her other friends. I feel like she’s almost embarrassed of me or doesn’t like me as much as her other friends because she’s never posted pictures with me or invites me out with them.

I’ve left her more than once sobbing because of how awful she makes me feel but I don’t even think she realises that she’s doing it because she’s the flakiest person ever. I gave out to her before after she stood me up and she was really apologetic and I let it slide but then she went on to do the same thing again.

I’m not skinny or pretty or popular like all of her other friends and sometimes I feel like that’s it but then I think to all the good times we have together.

Point is, my therapist has made me realize (and all my other friends), do the good times really outweigh the bad? I’ve realized they don’t.

I want to distance myself but I don’t know how to do that because I was there for her at some of her worse times and she was there for me but I question my sanity and mental health all the time when we’re together. What do I do?