Happiness

You know that feeling when you just wish that happiness is yours? When all that you ever wanted in life is to be constantly happy? When you forget how it's like to feel happy again? I kinda have that feeling right now. But i can't. I can't be happy now. How can you be happy when the one that makes you happy is not there with you? When that person is slowly drifting away from you? When you know you're nothing in their life? When you know, you're just another option and when you know you're not the one? How the hell can you feel happy again? 

Tell me how.