How do you know it's time to close the door on a friendship or relationship? It's simple: You know the time is now when you couldn't care less about the person. Not only do you become completely indifferent to the individual, but you reason that your life would be better without him or her. You feel there would be more peace and less hostility if that person were given the boot. Doing this isn't always the easy, especially when you've known the person for a long time. But let's face it -- legacy alone can't sustain a relationship through the passage of time. People and things change. A person you deemed your closest friend or soulmate 10 years ago could feel like a nuisance today. You know that's the case when you hear the person's voice or see they're calling you and you instantly roll your eyes. I'm actually going through this as we speak with a friend I have known since high school. Long story short, this once-humble guy got a good j...