I keep avoiding everyone, not because I don't want to talk to them, but because I get to anxious and nervous?

This does not sound silly. It is an illness. It is not something that will kill you, but something you will have to work through. You have really strong social anxiety. Some people are just born like that, others develop it during their youth or adolescence. The poi int is I think you should find a way to talk to your guardian or a doctor so you can get help, and feel more comfortable. Another suggestion is that you can practice what you will say to people before you do then rush up before you can change your mind. Good luck!