I agree with everyone -- she's emotionally blackmailing you, and that's ABUSE. She either forgives you or she doesn't. She doesn't keep bringing it up time and time again, and keep humiliating you by making you get down on your knees!!! HOW AWFUL.

NO ONE should have to do that!
This girl is NOT the one for you sweetie, cause she' s going to KEEP doing this kind of thing every single time you do something wrong. She's going to rub your nose in it, and keep bringing it up day after day until you BLOW.
This is no relationship. She's trying to be a dictator in my book. She's not forgiving, she humiliates people, and she seems to enjoy it. That's cruel, and I don't like cruel people -- do you? I don't think so. If I were you, I'd say goodbye to this one.
God bless you sweetie. Find someone more like you -- who is kind, sweet, forgiving, and loving. Take care. Hugs, Lee