Are you taking the piss?Dare I say an attempt is made to dilute the man-love tone down a bit?... and I was thinking more of the chorus...adapt the following maybe..!!
Denis, Denis, oh with your eyes so blue
Denis, Denis, I've got a crush on you
Denis, Denis, I'm so in love with you
Eyes so blue, crush on you, in love with you is even more man lovey than just repeating 'I'm in love with you'.
But yes, you could change the lyrics you've quoted, so it's less man lovey. Although I think 'I'm in love with you, do be do' is fine