How much longer will this go on?

Ok, Two years ago some girl was pissing me off and her underwear was showing like a little whore so i gave them a little tug and she got pissed of. She told everyone i gave her a wedgie and that I asked her for wedgie porn, which never happened. So now the whole school thinks im a perv and wants wedgie porn. So i left my friends who believed it and found new friends who never heard that story. I like this girl who doesnt know about the story but I'm afraid if we go out and she hears the story because of that then she'll break up with me on the spot and wont even want to be my friend. How much longer until people will start to forget about this. This has made me depressed and i've thought about suicide but forgot that after i met the girl i like now