Forget

Something not everybody does, no matter how much they're encouraged to.

The reason tomorrow is just another game to change for him/her is that he/she wants people to forget the who, what, where, when, and why of what happened today (because he/she thinks it's a game to everyone involved). If you go back far enough, he/she wants you to forget what he/she was really like as a kid, versus his/her image today, despite him/her always telling people to be themselves.

Forget

To not remember

person 1: What's the term for not remembering?
person 2: shit! i always forget...