I've changed styles, interests, phases ever since I was 10. I want my life to be ONE thing. I'm gothic but then I really want the entire pink rainbow razor pc setup. I want these cute stuffed animals but it doesn't match my posters. I switch music interests like crazy but I don't want to. I can't pick a single aesthetic, a single flow of interests. I don't know what I am! I don't know what makes me happiest. I love it all but I don't want to BE it all. I want consistency not overwhelmingness.

I've made all types of friends over the years and I see them and morph myself and my things into them and then when they go I'm left with being a shell of something I lost interest in and doesn't feel it's me. I'm a walking cluster of tens of old friends personalities. 

Does anyone know how to overcome this? What should I do? Is this a common problem?