Ironic that two of the poems which were most unforgettable to me have the word “letter” in them. I read Li Po’s The River Merchant’s Wife: A Letter in high school. It deals with love which grows yet sets limits: http://homepages.wmich.edu/~cooneys/poems/li-po-pound.html
Four years later in college I read A Letter by Anthony Hecht. While this protagonist also misses the object of his affections, he is in a different predicament and writes “I would have you know that all is not well” in the final stanza: http://www.poemhunter.com/poem/a-letter
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