Re: Think my friend might be schizophrenic
From what you have said I can see possibly 4 or 5 symptoms associated with schizophrenia. Those being emotional blunting or flat affect (lack of or inappropriate emotional response); jumbled thoughts; agitation (fidgeting etc); audio hallucinations and paranoia. I emphasise that the last two are not concrete as you are observing behaviour rather than experiencing it.
Try to talk with him about it, he obviously trusts you so he may open up to you. If through the course of time and/or anything he tells you, you suspect more strongly the possibility that he is schizophrenic urge him to seek help.
~ The journey of a thousand miles begins with a single step ~
* Nothing in the world has ever been accomplished without passion *