How can I get over the bitterness in my heart?

I am so angry with men right now it frightens me. To me it seems like they're always damn sorry for cheating or lying or doing something to hurt a good, honest female. I hear a lot of men saying "oh I want to find that right girl, but when they do find her e they just through it away or mistreat her. I don't get it and I'm to the point of thinking well why be the good girl that everyy guy wants, but doesn't know how to handle or treat right? I might as well just retired and say F-it but I dont want to be bitter....hmmmm any advice?