Poetry. Please.

My wife died last month
 and she loved this poem;

my son is getting married
and I want this poem
to cheer
for him and his bride;

I am sad
and nothing makes sense,
but these verses still manage
to lift me up;

I half recall these words
but can you finish the couplet for me
and help me to get it
out of my head;

I am ill and old
but give me some John Donne
to remind me that I was once
young and in love;

I am young and in love
and please don’t use my name
but play this poem
for my heart’s desire.