It hurts to love someone and not be loved in return. Haven't we all been there? Fallen for a guy who just doesn't feel the same way? It completely and utterly sucks. It is like having breakup syndrome, with out there being a break up.
But what is more painful is to love someone and never find the courage to let that person know how you feel. That too, feels horrid, you could go a whole life time wondering, what if? What if I had told him and what if he had felt the same. You can't tell your self at least I tried, because news flash you didn't. You didn't try. You didn't even tell him.