Schizophrenic is just a category we made up; sometimes it's useful, sometimes it isn't.
Whether or not you're schizophrenic, we're all living in internal models shaped by selection functions both biological and cultural. Nobody has access to base reality.
If being friends with the voice in your head is useful, you should do it. If not, you shouldn't. Careful with this one. If you want to delve deeper, research tulpamancy.
You are not a blank person or entity, that would be an oxymoron. There's a state approximating this that sometimes seems useful, but don't become so lost in your own narrative that you fool yourself into not recognizing your own limitations when such recognition would be useful.
We all control reality in the limited sense that our perceived actions affect base reality and there are causal arrows pointing both ways with regard to supervenient and subvenient systems. It sounds like you have the ability to control parts of your perception of reality. You can have fun with that in your own little world, or you can figure out how to channel it such that you act in ways that change base reality and have cascading effects which affect the worlds of others. Insofar as there is choice the choice is yours, but if you choose to recede into a world of your own then you sacrifice this opportunity.
You might want to consider various mental health options, but also it's okay to be different. Don't mistake the pointing finger for the moon.