Do good and good will come to you.
Even if you hear a bad story about me, understand, there was a time I was good to those people too, but they won't tell you that part.
No one should justify their bad behavior because of the good moments. It wont ever overlap the reality of how everything came to be. This is in reference with deceit and bullying. People make mistakes, sure. Though, good times can't mask a bad person. Being taken for granted when all you did was "good" is a whole other story.
Just because one person doesn't seem to care for you, doesn't mean you should forget about everyone else who does.
Thats life. People are only bad about others to feel good about themselves. Insecurity on their behalf. Keep others down it keeps them up. Leave these folk to their own devices, karma as a way of sorting such as this out. Judging and condemning others before you know them isn't my idea of nice, but I'm afraid it happens. I hear it every day. But i say don't be horrid until you know that person yourself.. judge for yourself.