Relationships: In General

My mom calls it "friends in spots."  There is a time and a usefulness for every relationship, and sometimes those relationships run their course.

There are people in life you meet that you know will be a great friend for you, no matter how long they are in your life, and then there are people you are not so sure of.  The ones you aren't sure of, find out what they contribute to your life or get rid of them.  Friends that are either using you, abusing you or your time, or causing other issues don't belong in your life. 

It's the same as dating relationships, if there isn't growth, it needs to be gone.  A relationship that doesn't grow either gets stale or needs to dissipate in some fashion.

Once a "friend" or someone on your acquaintance level has broken general rules of etiquette or friendship- sleeping with an ex of yours, criticizes you for things you are doing -like your job, your food, your hobbies, etc; it is time to schedule their departure.

People who cause me grief in my life aren't worth my time.  I cannot spend time trying to fix something someone else won't care to fix on their own- themselves.  If they have bad etiquette or are harboring hostile behavior towards you, the best thing you can do is shut it down, immediately.

My mom always said "Don't let them live rent-free in your head."  And expulsion from your social circle is the best way to address that.