3. He needs to know you’re responsible.
Marriage is a legal contract, and that means that it will have serious consequences in his financial realm. What most guys fear is that they’ll marry a woman who will drive them into bankruptcy through bad spending habits, refuse to do housework while they stay at home, and basically just act like an overgrown, selfish kid.
They don’t want that! They want an adult who will actually contribute, and they won’t marry someone who doesn’t fit that bill.