Hi, acetance!
I can't avoid looking back and see myself in your shoes when I was 17. I became an hermit and I didn't have interaction with others for seven years, so I can't be a model for you. I did what you are thinking to do.

What can I teach you? Nothing.
But, think that life works better when we consider the point in the middle. That is, for your own well being, it's better to not closed completely to people. You shouldn't give up contact with people, at least, those you feel moré confortable with.
Let me tell you that there are people who are worthy to know and share with.

Have you got the possibility to say your parents how you are feeling? They can help you to look for a good therapist.

I don't want you to suffer what I suffered in my way to the world.

Being here with us and tell us how you are going!
A hug!