I've often heard the statement "If you really love someone, you have to let him/her go..." I think this is a form of 'sweet lemoning' coz when he/she wants to leave (the relationship), nothing you can do can stop that person from going away. Don't fool yourself into believing that you can make him/her stay.
If you LOVE YOURSELF, you should let go.
If you LOVE YOURSELF, you should let go.