Why doesn't anyone like me or want to be my friend?

I'm really scared and nervous to go to my school now because even though i'm nice to every single person, no one ever really talks to me or anything. I'm pretty shy really, because i don't know what to say sometimes and i hate awkward silences. but maybe that's it that people don't like me because they can't even hold a decent conversation with me. I used to be friends with this group of girls that i really liked until they took in this new girl who i liked at first. I have no idea why, but i tend to get really jealous of other people when they get a new friend because i'm worried that they'll replace me. i'm also not a person to really open up about my feelings unless i know someone pretty well first. Well anyway, this new girl that the group of girls i used to hang out with, well EVERYONE likes her. I can't think of a single person who doesn't, and she's pretty mean most of the time. Well anyway, since i'm pretty shy, and since the person told me later, i'm really awkward to have a conversation with, (even though i try) so she decided to turn everyone in the group of girls against me and try to throw me out. that made me so nervous i was too worried to eat at lunch. i guess the girl and the others noticed, so the girl who everyone likes, (i'll call her "Maddie" so you won't get confused) spred a rumor about me that i was starving myself because i'm obsessed with ballet. So anyway after that, the entire group dumped me and i had no where else to go. The people who were nice and actually talked to me when i was friends with Maddie and the other girls don't even talk to me anymore. I know that everyone likes Maddie because she's funny but they're not scared of her. Maddie also told later on that the group kicked me out because i'm like a stalker because i usually just followed them around and didn't say alot but like i said i'm pretty shy. please help me!!! i'm sorry this post was so long but i needed to tell someone :(