6/ Jealousy
A little jealousy never killed anyone, and is even healthy in a relationship. It shows you both care about each other. But if jealousy grows, it can turn into an invader and ruin your exchanges by insidiously slithering into every one of your interactions. So try not to get carried away, smothered or controled by your excessive jealousy. Because it will lead you through many repetitive conflicts and destroy your relationship.
Read also : Apology letter for jealousy : Sorry for being jealous