The stories that your friends brought up that aren't rumors, how did you find out they were facts? No facts, no judgments.
Even if you knew these juicy tidbits to be true, think about how that would impact the way you feel or the potential future with her. You sound as though you enjoy her and there are future possibilities with her.
That's fucking awesome. Enjoy her, get to know her and see where it all leads. Don't sweat it until you see the three-headed baby that her evil twin is watching for her.
