Im not sure if I can be any help to you, but...
When I was your age I had similar problems. I honestly thought I was schizophrenic, often I would think i'd see something, usually out of the corner of my eye that just isnt there, though I did have bad vision. I also used to not want to be around people in general. I hated to be around people but I was afraid to be alone - I always felt like someone was watching me, i'd get a horrible feeling coming out of the shower cause it would feel like someone could see me. I never really hallucinated or heard voices either, like you, but I did talk to myself alot. Turns out, I am not schizophrenic, but I do have some problems with anxiety, and it can manifest itself in a way that makes you think there are other problems when there are not.
Do I think you are schizophrenic? Probably not.
Some of your problems are just part of being a teenager, like being disorganized and reclusive. If you have an anxiety disorder - such as social anxiety, hypochondria, or general anxiety and panic, I can see why you might confuse this with schizophrenia. And having someone tell you that they think are you, or researching all of the symptoms, are only going to convince you that you are.
You have to remember that having schizophrenia generally means that you are losing the ability to determine the difference between dreams and reality.
Maybe these are thoughts and feelings that will go away in the next few years, maybe not - I suggest going to a therapist for a professional opinion, but try not to diagnose yourself in the meantime because you might end up over emphasizing symptoms that arent the real problem.
