Why are my friend's parents doing this?

ok, i’m a 13 year old female. so i’m in the 8th grade, i met this girl who is one of my best friends. she is one of the first people i met when i first started middle school. ok, u know how there are “groups” at school… popular gothic emo nerds… and that kinda stuff… well i’m in the middle…i talk to everyone… but i love the color Black and so, i wear eyeliner,some black types of clothing, and so does my friend…well i went to her house like 5 days before i started the 8th grade…and when i got there, i met her mom and all, and the day went well, we were just to best friends… well today is like 1 week into school and ive seen my friend at school, she still dresses the same, and so do i. well i called her 3 times already…on different days. and i thk its her dad or older brother that answers the phone…i ask for her, and they say she is not here. and so the next day at school…i ask her…where was she yesterday when i called? and she says…what do u mean? i said, i called you like 2 times this week and they always say no that u are not there at this time… she said, what? i was there. they didnt tell me any thing. i just really want to know why…her parents are doing this to me…why dont they let me talk to her on the phone…is it that they thk i am a bad influence to her? i mean…all of her friends wear Black all the time. oh yeah…i forgot to say…her mom is catholic…or how ever u spell it. but, he mom has met almost all of her friends, and they dress worser then me, to where they actually die their hair Black, and wear nothing but black…and me, i have straight short hair, to my sholders now…cuz i got it choped…and eye liner…and maybe a black T-shirt with blue jean pants and white tennies and a white sweater for when they have the A/C on…why are her parents making a big deal out of me…when all of her other friends wear ALL Black?