I live everyday as a character in my head
Why do you live as a character and not yourself?
This is because I've failed in my real life to do things that were simple in my head.
You should be doing your best to live as yourself in the moment. Living in a fantasy world in your head is a terrible thing. Have you thought about talking to a mental health professional about this?
I got tired of it, I guess. Don't care.
Living a fantasy won't be fulfilling in the long run. Try to place yourself in the present and see the things around you to be grateful for. I'm sure once you look around, you'll see what you have to look forward to.