Teens!! Am I just not made to have friends? It's really making me depressed ):?

I'm in ninth grade.. Last year of jh.. I'm funny, kind, always there for people..etc.. And becase of these problems below I have started self harm... Ok well here's my history of friends: Meg- meet in kg, she left in gr.5. Kyerra- meet in kg, left in gr.8. Connie and gaybe- meet in kg left in gr.5,6. Chloe- meet in gr. 2, left in gr.4. Cam- meet in gr. 2, a$$hole too me now. Amanda- meet in gr.7, left in gr.8. Claudia- meet in gr.7, left in gr.8 ( she apperently hated me, and I always helped her) Amy- meet in gr.7, still at schol. Stopped talking to me :( Jose and Diego - meet in kg and grade 1. Nice to me but nit exactly friends. That's all in school. I'm in gr.9 now so last year of jh for me. Anyways, am I just not able to have friends :(? I'm so depressed over it. I talk to myself about problems because of that. I'm a social mess and I'm alone at school because Amy is ignoring me and her frends who where My friends stopped too. It's seriously making me depressed and I feel like a loser. The only friends I see on regular bases are ali (1 year older, at diferent school. More mature than me but I'm not immature) and Claire (2 years younger than me!! Hard to hangout with because I just can't relate too her a d it's boring hanging out with her) also, my friends at school have made me crie so many times (ex. Inviting me to bday party then uninviting, going shopping w/o me, going to movies w/o me) Im so confused!! I'm not even sure if this is a question!! And 2 things. I can't make friends because at my school once you make them they are set for the rest if school year, no exceptions pretty much, and I can't talk to Amy because she will lie or be a b*tch too me!!! Sorry for this question being long!! -Rachel!!!