They say that you find yourself, try to become a better person all your shitty friend they will be gone. God will not allow you to work on you, let you get better and heal and keep bad friends that influence you the wrong way. that is not going to happen.
People can smile behind their teeth, and it's a dog eat dog world; some people have bigger teeth than you do. So, don't go trusting people so easily 'cause they appear to be "nice" people. Nice is just a front for most people.