You aren't. It is merely a coping mechanism. I'm guessing you've figured at this point but I just want to make it clear, this loneliness you feel is what is causing your mind to trick itself in to believing this stuff just for some semblance of belonging. Of course, I don't know the full details and I am partially assuming here so, take it as you will. I know it's not just as simple as "oh well, go to a therapist or something." but only you can truly understand what's going on upstairs. Don't fall back on to these ideologies because that will only worsen the issue. This comment may not contain any advice, but hopefully it wasn't as redundant as I feel.

Professional help is always the best. And don't be shy about living with your parents. I knew someone that lived with their parents till they were 30 then bought a really really nice house with all the money they saved.

Any as far as who you are. Don't try to be anything specific (unless your in a job interview, then be exactly what they want to see), just do what comes naturally to you and a self identity will develope on its own. Heck I'm older than you are and I begining to feel like my hobby is trying to find a hobby! Lol

Best wishes!
:)

I think declaring you're an otherkin will just add to the problem.. ʕ·ᴥ·　ʔ

If you want I can help if you have kik