Just found out from gf that just before we were officially Dating she slept with a guy . This has really torn me up and I think I'm going to leave her as much as I don't want to (even though I was seeing people at the same time I didn't sleep with them ). How do you make sure this sh it doesn't happen , your are all girls like this ? EDIT Was this actually cheating? . In some ways it was in some ways it wasn't. What does red pill think ? Since then she has been lovely and pushed me to do my best and generally been a star gf.