Pain is a beautiful thing, isnt it?
In pain we achieve a higher mind set of life, such as "I will never do that again". False, you will till you stop feeling pain.
Remember that time you confused love, with a life lesson?

Pain is power, it can create body builders and models. Pain *****, to feel for someone who doesnt feel the same way.
Pain is loves opposite, not hate.  Pain is that same deep hurt of emotional stress that interferes in everyday life, such as love.  

The after math of love, or even liking someone causes a pain that flows through you like boiling blood, nothing can take your mind off it.