Light rain is pleasant, too much of it is a problem. Light sunshine is beautiful, too much of the same causes burning. Anything in control is wonderful but when it exceeds the optimum level, it starts hurting. Same with the amount of thinking you can have in a relationship. Overthinking is something that can hurt relationships. If you overthink in any relationship, you surely need to keep a tab on your thinking.
Five ways to stop overthinking in your relationship are: