I really need to know if I am schizophrenic?????

I often find myself talking...to me. Not in public, but when I am like alone. For instance when i study, if a thought comes across my mind, I get distracted easily, jumping from that thought to another and so on. In this way, I begin talking to myself, even to people who I know are not there. These thoughts often associate with something I could not do, or could have done differently. A common thought would be, If i lets say talked to a girl(in a normal conversation) whom i like, (in real life), afterwards when i would think about it, I would come up with better lines to say to her, and since that conversation cannot be relived, I start it on, by myself, talking to her(At that time I 'know' shes not there, so I am not hallucinating). I have read a bit of Sigmund Freud and he said that when we have great dreams, and see them being unfilled, we reach into a state of depression, trying to live in a made up world. I can partly connect to it, but i dont think that I am depressed in any way. Also my father's blood brother is a diagnosed schizophrenic, so i was wondering if it could come from genes. And please be honest in your answer, and keep in mind I am not mental(till now :), so do not write a goody-good answer trying to be gentle and all that. Thanx a ton!