Coincidence? I think not.

Everything happens for a reason.
Today I decided to leave for work a little earlier than usual to grab some cigarettes. In doing so, I found myself in the presence of a woman who had fallen on hard times. I gave her a few ciggs for the day and we proceeded to converse, and our conversation was rather interesting. Here's what I gathered.
People are who they are. It is not in our power to change these people. It is, however in our power to either allow them into our lives, or let them go on their separate paths.
Look at the people around you and ask yourself, "Do you deserve to be a part of my life?" Assess and adapt.