nothing to do with a love affair如何理解?

nothing to do with a love affair如何理解? Nothing to do with love,and lonely affair.Happiness is just nothing to do with a love I like you is my affair,has nothing to do with His ______ that he had nothing to do with the affair was gre 21.His ______ that he had nothing to do with the affair was Leave nothing to do with love My love has nothing to do with My happiness has nothing to do with love,with i love you but nothing to do with you Love has nothing to do with me ,for I love you,has nothing to do with