... It forces you to tap into resources you didn't even know you had.
Many men come to me a couple of years after their break up and say things like:
"It's actually the best thing that happened to me... It forced me to totally shift my life around and there is so much I discovered now about women and relationships... WHAOU!"
It is painful when you resist it.
It hurts if you are still looking at the past while your life moves forward at high speed into your future.