If someone in your life has become unjustifiably critical, disrespectful, or unappreciative, it might be time -- at least for a little while -- to give them the gift of your absence. The key to doing this is to leave the relationship before you feel no longer capable of giving your best. When you do this, people might actually miss you and remember why they were in a relationship with you to begin with. However, if you complain and attack before leaving, then others will only feel relief when you're gone.