If you get accused of something terrible with no evidence whatsoever, e.g. Cheating, abuse, SA, and/or CSA and your family/friends believe the "victim" over you and cut you off, don't ever let them back in your life when the truth comes out and they come back trying to apologize.
I've seen so many stories about the OP being accused of one of the examples I've given and the people in them always piss me off. If they, especially your family, believe the "victim" over you without any evidence, trying to get your side or seeing if you even have any alibis , then they always believed you were capable of doing something that horrible and always had that low of an opinion of you.