Bad friends are best avoided completely, and you should be wary when you meet new people. Always make sure that you clearly understand the motivation of the other person before you form a bond of close friendship. Some people will try to make friends with you because they covet what you have. Others may seem nice but they may not be capable of true loyalty or legitimate closeness. A bad friend can cause devastation on a scale that even your enemies may not manage, because they are closer and know more of your secrets.
A bad attitude is like a flat tire you can't go anywhere until you change it.
Don't fuck with feelings, just because you're unsure of your own.
The greatest prison people live in is the fear of what other people think.