I wonder, would you choose to stay with the person who you really love but in the same time you feel that that person doesn't love you as much as you do or to stay with the person who really loves you but in the same time you don't really love someone?
In my opinion love should be shown in a similar way by both sides.
Of cource love should be from both sides but sometimes we don't have what we want and then people have to make choice whether stay or leave.