Sometimes we hurt people and don’t realize it.
Good marriages are fostered by expressing regret even when we didn’t intend to hurt them. If you bump someone getting off an elevator, you probably say, “I’m sorry.” Why would you not do that with your spouse? “I’m sorry that my behavior caused you so much pain. I didn’t intend to hurt you but I know I did. I feel badly about it and I hope you will forgive me.”
Sincere apologies make it easier for your spouse to forgive you. You don’t have to be perfect to have a good marriage. But you must deal with your failures. “I’m sorry” is a key ingredient to a loving marriage.