What if your husband falls out of love?

Many challenges happen in marriage. Such as finances, children, time management, etc. I have seen many downfalls in marriages and many wives are clueless to the situation, well because they are doing their duties in the house and still think they're being a great wife. When a man sees your efforts and sees your hard work, how can he fall out of love? Men are usually designed to take and women are usually designed to give. What are ways to make your spouse fall in love with you again? Should A women give less? This isn't personal this is an observation.