Getting over marijuana. Help?

Hey guys I went to a party a while back and was really stoned reeked of marijuana she smelt me out in no time her mom found out her friends hate me. I really really REALLY like her…alot how can I show her that I’m done with dope. I am going to stop i broke all of my drug paraphernalia and really dont want to smoke again, so two questions: how can i quit and stay off. Second is how to show her that I dont want to smoke again. she said that shes done with me but I really want to turn over a new leaf (see what i did there) hurr hurr. All jokes aside any help would be great thanks everyone. And no stupid “may christ be with” sh*t.