A relationship can be damaged by many things. One is disagreeing with each other. When people don't agree, they damage their relationships by breaking up with each other and divorcing. Another is being abusive. This makes people quickly break up or divorce. But the person being abused may be too scared to tell anyone. I hope this helps! :)
Similes use the words like or as to compare things—“Life is like a box of chocolates.” In contrast, metaphors directly state a comparison—“Love is a battlefield.”