Unlike almost everyone else here, I have great respect for you. Instead of telling the world about your relationship problems you still protect her image and reputation instead of taking the low road. You are a good person OP. You'll find someone out there that's worthy of you.

i recently got married to my wife but in the two years before the wedding she cheated on me twice. we talked things through, worked it out and now were happily married. and while yes she cheated we loved each other enough to be adults and talk. so i really don't agree when people say stuff like she was a cheating **** and so on. this is my story and i dont know the guy who made this fml but thats my feelings on the matter. if things were bad enough to make you guys break up thats a shame. tell your family that if you don't want to tell them about her cheating on you.

just because they loved her doesn't mean you should hide the truth she cheated.

Dude, please tell them otherwise you won't hear the end of it. At the end of the days that's your family and they should be on your side no matter what, and if that means you breaking the news that your girlfriend was cheating, so be it.

I would tell them. It's not your fault and it sucks to be "charged" for something you don't deserve.