The hippies of my generation notwithstanding, human love isn't always pleasant and kind and flowers and beads. Love is often difficult and usually messy.
This notion that love shouldn't hurt is all screwed up. Sometimes love hurts. I don't mean abuse; that's different topic...but when someone you love betrays you or dies or just leaves, it hurts. Or when someone else hurts someone you love, that hurts, too.
Love isn't for the weak or for cowards. Love will demand from you every last drop of courage and strength and commitment that you can muster up. Hence the picture of the menacing cat instead of a cute little kitten.
There are many kinds of love ranging from the totally physical all the way to the totally spiritually. The preceding paragraph means all these different kinds of love.
So why do we bother? Please give me your answers.