Because.

I don't want to know you. Because I know you'll let me down. I know you're not who I think you are. I'm taking the steps back, rewinding and erasing the beginning. I'll blur the first few chapters that have led to this point.
I won't know you. I'll end our acquanitance short and quick. I'll cut it off like a piece of string and switch it off like a light switch.
We'll go back to how things used to be. Because I don't want to know you. I don't want to be disappointed.