Disrespectful.

I sickens me that so many people don't see cheating as a form of disrespect. If you're in a relationship that you're not happy with, then end the relationship- don't cheat! It's that simple. People come up with countless excuses for cheating these days. However, there is absolutely no excuse for cheating. I would never cheat on a significant other and I would hope that they would do the same for me.