How to get over soneone?

Can you fix a heart that has been broken beyond repair? I know that it seems impossible. I know that you see them in every face you meet, you find their traces in every little thing you see. I know they still haunt you in your dreams. I know how it feels when you remember all the colours and promises that are now shattered. I know it pinches hard somewhere and you can't stop blaming yourself. I know how it feels when you are so helpless and exhausted and all you want is to rush back to them.