Ah, the old character assassination attempt! This is a HORRIBLE thing to have happen! Unfortunately, the only way to get through it is by being the better person. Eventually, the people that count will defend your name and the others will stop talking about it because they won't have evidence to back it up. Even though it is going to be really hard and lonely for a long time, hang in there. I've been through this and if you need anyone to talk to that might understand, please feel free to contact me.