It’s natural for humans to bump heads -- especially two people in a physical relationship. The problem is when every fight starts because of her jealous nature. Whether she is envious of another woman, a friend, a promotion or anything in your life that, for the moment, seems more important than her, if her jealousy is at the center of every altercation and the fights all feel exactly the same, there's a problem.
Why It's Harmful: Fighting happens, but the disagreements in your relationship occur so often you often forget why exactly you’re fighting at all. So you give in, call a truce, or shoulder the blame just to end the issue. The peace doesn’t last long because jealousy rears its ugly head again and it’s all back to the beginning. No relationship can last if there is more fighting than loving.