Tell the other person as often as possible: “Thank you for standing by me in the good as well as bad times.”
A similar phrase is used in wedding vows. Understandably. People who share the worst with us, also deserve to share the best by our side. For this reason, appreciate the difficult times. They enable one rarity – to see what the people closest to you are really like. After all, ideal partners can be defined in a mere thirteen words: They help each other in bad times and laugh together in good times.