selfish love always ends in depression. It has to do with knowledge. When you know yourself so well, what else is there to do to find out more about yourself? Nothing. Hence, the reason to date other people. You'll never really know them which is what makes it so exciting to be around other people; not knowing...and still trying to find out. Selfless love is what it's all about. If it wasn't we wouldn't be here right now would we? Who are we to disrupt a billion years of evolution?