i need help with this guys :( badly be warned: its another sob story....

ever since school ended last year, my old best friend has been...really different. she started hanging out with me less and less, until we barely talk in school anymore....she hangs around with girls she knows i dont like. she doesnt stick up for me when someone is saying something bad about me. she disagrees with everything i say, even when i know she doesnt mean it.....the worst part? whenever i go over to her house (my mom and her mom are best friends and are like sisters) she acts completely normal. she talks and laughs with me, and whenever i told her about how she acts in school towards me, she says sorry and she wont do it again. she ALWAYS DOES!!! :( it makes me think shes ashamed to be seen with me in public....
bottom line ( this is what i think ): she used me until she found other friends...:( other prettier more 'popular' friends. in school i talk to no one but the teachers, because no one likes the same things i do, and no one talks to me
ANOTHER THING IS my mom and dad dont get me....neither does my whole family. i know they love me...but most times they dont act like it. my mom cusses me out everyday, saying i'm a "little ungrateful witch" or "dumb ass" or "unhelpful brat" and a million others....
she loves me and so does my dad, i KNOW they do, but they still treat me like im crap for half the day.
my best friend used me until she found better friends, and then threw me out. when i love someone, i love them for who they are, unconditionally ( including fanpop friends) but the one friend i did have where i live, threw me and my love out like trash.
my mom yells at me whenever she gets mad...even when i had nothing to do with it. my dad isnt so bad, but he is still kind of an ass most times.....
am i only trash? :( thts what i feel like. i feel used...over and over again. i feel like im nothing to anyone.......has anyone else felt completely and utterly alone? like theres no