Only way to fight this fear is to face it. Notice how you say " I THINK anyone would like me," the first day at school is going to be horrible, I THINK." It's the same as saying "what if..." You really have no idea what your first day of school is going to be like, your just guessing.
You need to face reality. Not EVERYONE is going to like you. Some people will not like you, but most people will love you.
Your negative feelings are in a repetitive cycle. Your feelings are going to effect your thoughts, words, actions and how you react can effect how other people react. I'm not sure avoiding everyone is a good idea. Say hi get out there it will make your experience so much more enjoyable.
Most importantly your life is worth living. Never ever forget that and if you ever need to talk remember that we are here for you at PC. I know you will make plenty of friends.
I wish you the best of luck