I hope you're feeling better
And close "with love"
The way you do
I'm gonna sit right down
And write myself a letter
And make believe it came from you
This is either a massively passive-aggressive message ("write me, damn it!"), or it's just darn sad. Either way, it's a little odd that the melody is so cheerful (it's kinda "Tip Toe Through the Tulips" to me somehow), but perhaps because I can totally see myself doing exactly what the lyric says, I like it just the same. This tune, written in 1935 by Fred Ahlert (music) and Joe Young (lyrics), was a Fats Waller standard, later recorded by plenty of stars, including Frank Sinatra with Count Basie, but also Bill Haley and the Comets (in a rejiggered version), Tony Danza, and Danny Aiello. Me, I'd go with Nat King Cole or Sarah Vaughn.
YouTube has the Fats Waller version, snipped from a cute Sesame Street vignette. Hats off to PBS for introducing this one to the young'uns.