Where Do Broken Hearts Go?

A girl got her heart broken and her life ruined. She needs to find a way to escape and now that she finally had a chance to break-free, she finds herself in someone's arm to comfort her and bring her broken pieces into whole again, slowly falling in love with this person. But what if one day, this person just leave her when she got herself together now, leaving her with a broken heart again. Like he doesn't exist at all. But wait, does he really exist or everything is just a part of her imagination to help herself ease the pain.

Where would she run now? Where would her broken heart go?