I dont like going to my school?

So its basiclly like this. Ever since the begining of last year ive practicly had no friends. I would just walk around the school or sit by myself at recess at lunch just waiting for the bell to go to go back to cl. The only friend i really had was a girl called Lea who was my childhood friend. I could talk to her about anything. She kind of had the same problem as me only everyone inher cl hated her. The day came then she told me she was transferring schools, I was devistated. The last day of term 2 came and i hugged her and asked if she would K.I.T with me, she aggreed but then when she transferred I hardly ever heard from her and still dont. I know shes really happy in her new school but I wish she didnt cut me off. Term 3 came around and it was back to the usual stuff walking around the school, sitting long just waiting for the day to go by. 2 weeks went by and my mum announced that she found a school for me to go to, I was so happy! But then I didnt know better and made friends with one of the popular girls. In the end I didnt transfer and we were buds until the beginning of this year when she cut me off halfway through term 1. I hate myself for not taking the opportunity to transfer schools last year. Im neally halfway through year 7 now and I have only one friend but it feels kinda awkward around him. Whenever theres an activity in cl and we need a partner or need to get into a group im always the one thats left out. I hate my new cl so much. I hate my clmates. I hate this school! I have talked to my mum about t but she says just to stick through the rest of the year but i cant! I always find myself crying at school at recess and lunch times and she knows it. I was sitting by myself once at recess and i was crying and the teacher saw me and i think she knows whats going on but im not certain. Theres also a group of boys i used to hangout with but apparently there was a "group decision" to boot me out. Ive only got two terms left of school before highscool. What should i do? Should i find a way to transfer? Stick through it? Please dont say for me to talk to my mum about it because she wont listen. I haven talked to anyone about it really. Please help me :'(