On long train rides I scribble little lines and tape them to the window like tiny postcards—so I get why you want short poems that hit the distance in one breath. If you like classic, intimate lines, go for 'i carry your heart with me' by e.e. cummings; it’s compact but feels like a pocket-size vow. Emily Dickinson’s 'Wild Nights — Wild Nights!' is another short gem that reads like a storm of longing across ocean miles. For something earthier and older, Robert Burns’ 'A Red, Red Rose' is a ballad that’s easy to text as a single stanza and still carries weight.
If you prefer contemporary, try short pieces from Atticus or Lang Leav—modern, blunt, and perfect for midnight messages. I also love sending tiny original things: a haiku at dawn, or a two-line note that says more than a paragraph. Example I sometimes use: "Map in my pocket— / your laugh folds the routes home." Simple rituals help too: pin the poem in a photo message, read it aloud in a voice note, or write it on a coffee-stained napkin and mail it. Those small, tactile things carry distance better than megawatt declarations.