Love is about giving yourself the highest. When you love somebody, do you want to stop short of giving them the highest possible? Similarly, when you love yourself, would you stop short of giving yourself the highest possible?
The highest possible is not contained in pleasure nor in happiness. Both pleasure and happiness leave you craving for more—and you know that. We all have experienced pleasure. We all have experienced happiness as well. Have they ever been sufficient and final? Never.
Therefore, if you love yourself then it is not pleasure or happiness or gratification that you want to provide yourself. You want to give yourself something that lasts, something that is trustworthy, something you can pose your faith on.