I told my fiance its me or her best mate weddings in 3 mths read the rest am i in the wrong?

My fiance best mate just leaches off her all the time,when i got with my fiance i found out she had been out with her brother,he cheated on her and had a kid with someone else.she took him back and stayed with him for a further 6 mths because she didnt want to lose her friend.he dumped her again.i was horrified when i found this out,she still sees her mate twice a week,the day i proposed her friend told me her ex proposed same day which ruined it for me.my fiance went out with her mate all day and night and bought some sex toys for us,but after she came back from night out she woke me up dreaming and said laughing jamies wish list who is the name of her ex.i made her choose her mate or me im sick of that wobloke in my life i dont want her at my wedding she was to be maid of honour am i in the wrong,or standing up against someone who i hate.my fiance stayed with her ex not to hurt her feelings thats sick right?
Answer
You cant really expect her to drop her friends for you? her so called friend sounds like a nasty piece of work. your fiance will hopefully see this for herself some day. try and smirk and hide your feelings. nice luck!