What makes me sad?
How shallow love seems to be. I've seen way, way too many people cheating on, lying to, and backstabbing the ones they go home to every night. The attitude that almost all of my male friends have of women being for nothing but sex. Most of my (former) female friends have cheated on their boyfriends.
It seems the more you trust someone, the more likely they are to be lying. And the biggest loss is the time you devote to them.