Did I overeact ?, Do I have a reason to be mad ? , your thougths and opinions please.?

My best friend had an emotionally abusive boyfriend for the last year but recently broke up . Im gay and never had I shared an intimate moment with my best friend never had I disrespected her in such way , she once had a crush on me before me coming out to her and I simply rejected her crush , I mention this to emphasis how in reality I really don't and did not wanted anything other than her friendship .While she dated her ex boyfriend he seemed to not like me ,, he refused to believe the fact that I am gay and was not comfortable wit ht the idea that me and mybest friend spent so much time together which to me seemed like the onlyl normal thing for us being so close . Her boyfriend created such soap opera in his head that I WAS PRETENDING TO BE GAY and wanted I WANTED TO GET INTO HER PANTS , He came to such extreames that he once gave her choice it was either OUR friendship or his " love" I honestly feel like he felt treatend by our friendship because I seemed to be a very wise friend that always guided her away from anything negative ,, I think he felt that I was a treat to his relationship with my former best friend because he very well knew how abusive he was being to her and he thougth I'd convince her to leave him which in fact is false ,, I always tryed to help her trew her relationship problems and I served as a wise source of advice towards her . There came a time where he broke up with her and she fell into a deep depression where psychological help and antidepressent were being used a caused of his behavior . later on did she confess to me that the reason why she sort of backed away from me was because of the choice he had given her . She apologized and I FORGAVE HER but strongly adviced her this guy was no good the same way any friend would . There came a tiem were she insisted we'd hang out regardless of what he thougth about this , she reassured me her former relationship and current communication with her ex boyfriend would not get between our friendship as it once did before. today I found out there was a get together at her house and gave her a call and asked her " hey so at what time can I stop by your house I heard your having a get together " she responded "no dont come my ex is here and you know he doesnt like you . I told her " he's the one with the problem not me if he cant stand me he should stay home why should i obstain from this gte together because of his uneccesary grudge agaisnt me " ,, she insisted I stay home . I honestly thougth she was being a bad friend how is she going to tell me to not go to her house which i always go to regardless of the occasion , she was clearly trying to satisfy him because she has yet to have gotten over him . I feel a real friend would tell her ex boyfriend to not come to the get together because there is no way im going to tell my best friend to stay home because you dislike him . At this point after the phone call I was very angry and decided I was to show up regardless of her me not being there I thougth once im there I can speak to her ex boyfriend which by the way never actually had a covnersation ever on his jealousy ,, and clear things out however there was no way I was to show up after previously being told not to be there so I told a friend of meines to text me " hey leydy says come to her house now !! " that way I would have a reason to show up and have proof that someone sent me a text to sho up at the gathering . I arrived at her house and called her to open the door she very rudely told me to go home and responded somebody texted me to go to your house I figured you approved and told someone to write the message so now im here how are you going to tell me to go home . She came out the door chasing her ex boyfriend which was leaving because I arrived , how immature !! I went upstairs and spoke to her mother on the situacion and apologized for mu sudden appearence and her mother which is very fond of me said dont owrry its okay you have no problem being in my house . my friend went inside and called me up stairs and was trying to convince me to leave because he ( her ex boyfriend was going to leave ) there I told her my point of view on her messed up behavior she didnt seem to care and insisted I left ,, in behalf of my anger I told her she was being an extreamly bad friend , and to put herself in my position , and to understand just how bad I felt about me being her 3 year long friend being asked to leave because her ex boyfriend doesnt like me , I finally told her to forget about me that I no longer wanted to be her friend , that shes being extreamly unfair and a bad friend and i went downstairs and said goodnigth to every one and left everyone else seemed upset at me leaving recognizing just how bd of a friend she was being , Did I do rigth in coming to her house and addressing my hurt feelings ??