I recently moved in with a really good friend and a girl he knows. It's great so far!
My friend, he's very very goth. Plays in a metal band, all gothy clothes and decorating style. He's got a style. 
The girl is super feminine and girly, has a distinct style for her clothes, everyone thinks of stuffed animals when they think of her. She's got a style too. 

And then there's me. My clothes range from goth to preppy business casual to streetwear to very feminine. My bedroom is filled with an eclectic mixture of things that have no consistency. I have no actual "style"
Nothing that I can sort of define myself by, or call myself. I never feel like I know who I am or what I'm supposed to look like or how I want to present myself. My sense of self is... non existent. I just don't know what or who I am. Or how to find that. 
I steal too much of who I am from everyone around me or sometimes just what I get drawn to on social media. And start basing myself around that identity for a week, maybe two or three. Then it's gone and I am back to nowhere and nothingness until I find something new to leech. I hate it. 

Do other people do this, even just with clothes? How do I start to establish my own self and not be everyone around me? 