One of Leo's greatest sources of pride is their generosity. You willingly open your heart to others, and try to find ways to help them achieve their own greatness.
But sometimes, they don't understand how important your loving gestures have been for you, and forget to offer their gratitude. You need to hear "thanks" or you'll head for the hills.
Rather than letting that famous Leo fire out and losing your temper with your partner (or walking away too hastily), remind them that you give from your heart. Mutual gratitude just makes your union that much stronger over time. Anger won't solve anything. Agreeing to build a solid foundation for love will.