I need answers

Ok so my abusive ex bf got into a heated argument a year ago and I remember he took a knife and stabbed him self but what he told his family was that I did it. Till this day it makes me angry that he would lie on me about something I didn’t do. I just hates how he still painting me out as this crazy person when I’m not. He even tells his new gf that I’m crazy. How do I cope with this ?