The majority of arguments can be avoided by clearing up misunderstandings.  Instead of assuming things and holding a grudge, it's best to talk things out and be in good terms, especially if it was one-sided to begin with.  This has happened to me several times, but the one mistake I keep doing is I keep ignoring it instead of confronting them and actually try to work things out.  Of course, if they’re not cooperating at all, then might as well forget it. 

What I’m trying to say is, hating someone for practically no reason at all is a waste of your life.  In my personal opinion, hating someone hurts more than being hated. Actually, when someone hates you, it turns out they don’t know you at all.

Working things out will be the best for you and that person.

Especially if it gets to the point where that person talks behind your back, calls you names, etc.  I find it annoying when they don’t even bother working things out with you or even try to listen to your side of the story.  Really, I think we should all just get along.  There’s nothing hard about doing that.