How to fix yourself?

How do you fix yourself when you feel like your broken.. You spent so much time investing yourself into someone else, spending countless hours thinking of them or just spending time with them in general. Then what do u do when they disappear? You sit at home watching countless movies thinking to yourself maybe the memories you have with him will subside and the pain will lessen. Maybe he will figure out one day that he is madly in love with you because he had an epiphany. Then u wake up. How do you fix a heart that hurts? Time maybe? Maybe this particular question doesnt have an answer at the moment, just writing it down. *Sigh*