Sometimes 2-1=0

The story is all about a guy who was much in love with a girl, the girl who was his best friend at a time, but his luck didn't took his side as his girl was cheating on him, sleeping with other guys and all that stuff, she was a party all time types girl, who lived in a big, much big house, the author was trustworthy and loved his girlfriend throughout, the author considers himself as zero when he get the news about his girlfriend that she is dead and will not be back ever, but as she left unhappily for heaven or hell, no one knows, she comes back to the author after her death and the author finally feels too blessed as he notices that she is looking at him always, she is with him always.