Bad girls & good guys?

Ok so why is it that all the good guys are taken by girls who cheat on them over and over but yet they stay with them. Or is it just me that I have all the bad luck with guys? Like for instance this girl I know cheats on her boyfriend all the time like...

when he's at work she will bring guys to her house and bang them and people have told him over and over and he knows its happening but he stays with her. But when there's a girl who likes them and will stay true and is a good person all around they still stay with the bad girl. Cause I have had personal experiences with this and it just seems that I always end up with nothing while the "bad girl" gets the guy. Ughh that just really pisses me off. Can anyone just tell me why?

Those situations are just considered the luck of the draw.

Good guys are sucked into the idea of a "hot" girl and being with them, they just hold on to that idea and it can hurt them mentally.

Bad girls don't deserve good guys in my opinion: Because good guys that are honest and true, and worth more than the appearance that they sometimes give off. (Take a look at me lol)

But like I said, these situations are just the luck of the draw, they can leave each other, and get on with their lives, but it's just a cycle.

I agre with the above, I've always wondered why people both women and men are in love with people unworthy of them.