The Walking Dead, as written by Robert Kirkman's 3 year old child. This is just unplayable.
Also, I'm not sure what country you studied in, but that is not how you write speech.
"You: Hey, my girl. You going to school?"
This is halfway between a transcript and an illiterate ape writing a novel. It's either:
You: Hey, my girl...
OR
"Hey, my girl..." you say/said.
The "you" does not go in the speech marks, and if you're using speech marks, you do not put in the colon.