What is pain? Pain is the feeling of getting hurt not just physically, but mentally and most of all, emotionally.
It is the emotion you feel when the one you love doesn't love you back, when someone cheated on you, when you are left alone holding on to his/her broken promises, when things with sentimental value are lost, or when you are taken for granted by someone you care for. There are so many things that can give you pain. But this I tell you: Pain is part of loving someone; loving is part of happiness, thus, pain is the root of happiness. If you are hurt emotionally, it is alright to cry. Remember that most of the times, the best beginnings come from the saddest endings.
Cry, but don't