Here’s what I think. I think you are an amazingly creative person who is a novelist in the making. But I also think your imagination and creativity have gotten linked with the social phobia. What started out as a creative time in your imagination now has become a way to avoid a social world where you never feel as competent or as confident as you do in the world in your head. Of course, the longer you stay in that world, the less experience you have in the real one so you continue to lose confidence and competence. And around and around it goes. Of course you want to be in your fictional world. It’s where you feel safe. It’s where you don’t have to deal with feeling out of it and friendless.
I suggest two things. First — Do write that stuff down. You’ve been rehearsing and refining your fantasy novel for years. It deserves to see the light of day. Once you get it on paper, you’ll see where it’s perfect and where it really needs more work if other people are to understand it. Get yourself a book about how to get published and give it a try.
Then — Get yourself into some therapy to deal with the social phobia head on. Yes, it will be hard. Yes, you will be asked to start to wade into some social activities. But first you’ll be taught some social skills so you will have the tools you need to be successful. Think of it as material. You’ll learn a lot about human relationships that will help you make your characters even more three-dimensional. Since you are so experienced in using characters to try out different realities, it might even be helpful to make up a character to go through the skills training with you.
If you need some encouragement along the way, keep the phone number for the Boys and Girls Town Hotline with you. Counselors are there 24/7 to talk to teens who are struggling and who need some support now and then. Their number is: 800-448-3000.
I wish you well. And I hope to read that novel someday.