How can I improve my self esteem and make friends next school year?

I am a thirteen-year-old seventh grade girl. During my first school year of junior high I have been bullied in a very haring way sixteen times. I consider myself a loner. Not many people say anything to me and that makes me feel weird. There was a recent partner project during Math and my partner never allowed me to do anything. When I did speak up for myself she acted like I did not exist. On other group projects, the group didn't allow me to do much or I was rudely nagged at the day a ignment that was due three weeks later. During Health and Fitness I have gotten bullied the worst. One day I was being called fat, gay, & stupid & got hit and slapped hard several times. Life has been hard on me since I moved to the town next to the town I was living in. These are possible reasons why I am getting bullied-I am five feet & six inches tall and weigh 153.8 pounds: My Daddy says that I do not look very chunky anymore. I have not gained weight for two years. Sports are not my thing, as running makes me tierd afterwards. I get nervous during Health and Fitness, because I am afraid of doing something wrong, leading up to nagging. I have Attention Defisect Hyperactivity Disorder: Not feeling or touching something is medically impossible for someone with ADHD. I'll be just playing with something in my hands and someone will be like what the heck are you doing. I have the type of ADHD where Math is a huge struggle. Sometimes I interupt, but that is only because most people ig ignore me. I am in Special Education: I only have to go to a cl called Academic Lab instead of having an elective. Next school year, I wish I could have better self esteem and friends. I haven't had much of a school year.