This sounds like middle school. No real friends would treat you badly or go along with a nasty "ring leader".
Time to get out there and make some new friends. Find something you're interested in, and sign up for a class or hike (depending on how old you are!). I know that in my town, there are regularly scheduled hikes in the arboretum, or musical/dancing events that are great places to meet people. If you're still in middle or high school, maybe sit next to a loner at lunch time- lots of times, these kids are a bit shy, but very nice people. There are decent people out there who'd make great friends. I wish you the best!