Here is a profound truth I've learned in my own life: if you want to allow love to die in your heart, let your mind focus on hopelessness and despair today.
The heart and the mind are inextricably connected. What goes on in one affects the other. Personally, I believe the mind and our thought life controls our emotions in our heart. Therefore, if we just learn how to think rightly, we will then feel rightly.
Your heart needs to be filled with love. It is the most powerful force in the universe. But it can't be filled with love if you mind is filled with despair. Your heart can't be energized with hope if your head is filled with discouragement.
Therefore, spend some time today letting your mind focus on hope. See the world through the eyes of faith. No matter how desperate things may seem, trust that God has the world in his hands and is overseeing all, especially your life.
Then feel love increase in your heart today. It is that simple.