What happens when ya best friend turns her back on u?

well it last week i asked her if she would go 2 a football game with me and she said that she would goand then the day came and i called her in the morning 2 tell her i was gonna call her lata 2 tell her if she wanted 2 be picked up and she totally changed plans with me for her boyfriend (that she's not all that happy with right now..) and they ended up going 2 a diffrent town and then yesterday she called me and asked me 2 go 2 the mall with her and i said no i cant and then she had the nerve 2 call me again and ask if i would go carve pumkins with her and she ketp callin but i never answerd it...and then her mom has the never 2 get into it and it's been pissin me off...soo she called me 2day and asked why i didnt show up yesterday and i told her that it didnt matter where i was and she got all grouchy and then i told her i'd call her back and i did and she didnt answer, she just hung up on me ....idk what 2 do???