I (19F) and my best friend (19F) have been friends for about 4 years now. Recently she has been seeing another one of MY friends that I introduced her to and they ended up getting into a relationship. I had no problem with this and was extremely happy for the pair as I was the one to introduce them. My best friend started to drift herself from me, I asked why and she told me it was personal problems so I reassured her that I was always there if needs be. Prior to this she was out with my other friends (20M, who she is now dating), my closest friend (18F), her partner (19M) and another girl. During this time she had said some hurtful comments about our friendship to my other friends who later on told me after I had explained me and her were no longer friends. She made out I had neglected her as a friend in front of the whole friendship group but had fucked up by doing this considering I had all the phone calls to prove it was always me reaching out and I basically live with my partner who constantly has to listen to me getting upset about her not trying with our friendship no more. Once my best friend and other friend (20M) got together, I was not told. I assumed this was something you told your closest friends so finding out from someone who they both hardly speak to really upset me. She told me 2 days later that they were together so I let me finding out from someone else slide. During the conversation between me and my best friend, my friend (20M, her partner) then removed me from social medias. As she was now his girlfriend I asked her what was happening and why he removed me. She told me she “didnt want this negativity” and straight away jumped into “im not manipulating him to do this” despite me only asking a question. She instantly became very defensive and she knows about my personal issues (I struggle severely with my MH and physical health which I am currently getting help for but it has made me a very isolated person sadly and I have about 4 friends, now 2 and this doesnt include my bf) I explained that I wasnt accusing her of anything but if she did have anything to do with all of this it was very low and she knows that he is one of my closest friends and I dont have many, she responded with “i dont care” I turned to my friend (18F),who they had gone out with prior to all of this and was another close friend of (20M), to see if she had been removed because I do understand to an extent that girls can dislike their partners having female friends. She hadn’t been removed and he told her if she wanted to know why HE removed me, she should talk to MY best friend. This is where it gets weird, if HE was the one to remove me, why couldn’t HE tell me why? I understand girls not wanting their partners to have female friends but I introduced them, why would I want her bf? I was friends with him for 3 years and I have a bf who I am extremely happy with. This is not the first time this has happened. This same best friend made me lose contact with a boy I was friends with for 5 years because they got into a relationship after I had introduced them once again and she had turned him against me, still to this day me and him do not talk due to her actions.

AITA for cutting her off after finding everything out and noticing the pattern or am I overreacting?