Gentlemen, I need some advice. I have a plate who I have been seeing for a while. She treats me like a king. But due to some recent information I came into about her past, I want to drop her. Here is my dilemma, a) she does not know its coming and is trying to get more serious. b) obviously I'm not gonna tell her the real reason. (the newly acquired information) Basically, my question is, How do I drop her while minimizing the chances of it backfiring ? How do you drop your plates? stories/tips?

EDIT: Spelling, added a question.