You should never be afraid to lose people -- whether close friends or mere acquaintances -- if keeping them in your life means losing yourself in the process. And how might you lose yourself? You can lose your self-identity by (1) changing yourself to appease them (2) doing everything in your power to please them while neglecting your own needs and wants. Sure, in any relationship, a little flexibility -- some give and take, if you will -- is to be expected. Sometimes you may accede to the other's wishes as far as where to go and what to do. Maybe your friend has kids and you don't, which necessitates planning outings around their busy schedule. But a line needs to be drawn somewhere. If you find yourself making concession after concession while the other person refuses to meet you halfway on anything, let's call the relationship what it really is -- one-sided. Unfortunately, some people become a little too complacent, expecting the other person to always bend...