How could i?

In everything in my life how could i let the one thing that ever mattered slip away?
he was the one who helped my broken heart, who made all the hurt disappear how could i let him go?
everyday i miss him more and more
i become empty inside with every passing breath with every beat of my heart. how could i let him fade away?
it didn't work because every time i get close to someone i push them away. how could i let this end?
I'm so stupid. i didn't know how lucky i was he was the best thing that ever happened to me how could i treat the one i loved so deeply so bad?
i guess i should have had my eyes open so i could have seen this coming. how could i let him go?
how could i?