I Can Feel My Heart Ache

All around me there are people in love. My parents are in love, sister, friends... But here i am alone. Going after someone that would never choose to be with me. That has proved over and over, he has moved on. Everyone looks so happy. My sister, who never talked to anyone, became so social after she met her boyfriend. Everyone says my father was aggressive but he became so gentle. I never make my ex happy, and he always makes me cry. My dad says be with someone right for you. Make sure you are happy and laughing with them, if not they aren't the one. So why is my heart stuck ? Why when i think of happiness it means discomfort for him ? Why do i have feelings for him, when he already stopped feeling anything for me ? My heart is shattered, and though i know what love is, i can never find it. Every day is a constant pain because i am trying to bring back a love that is already dead and buried. Like dragging myself on broken glass. I am constantly causing my own pain.