The hardest part of long distance isn’t the miles. It’s the texture loss. You stop having the small moments that glue a relationship together — the offhand jokes, the “look at this weird thing I saw”, the way you just are around each other. Texts try to paper over the gap and mostly can’t. What fills that gap is writing. Real writing, where you describe what your day actually smelled like, what the new coworker did, the thing you couldn’t stop thinking about on the walk home.
Psychologists who study relationship maintenance (Stafford, Merolla, and others) found that LDR couples who use richer, slower-channel communication — letters, voice notes, scheduled calls — report higher satisfaction and lower anxiety than couples relying only on texting. The reason: asynchronous depth creates intimacy that instant messaging flattens. A letter makes you sit down. A text makes you react.
Letters also solve the time-zone problem without the 3am guilt. You’re lying awake in Seoul, they’re starting their day in London — a letter lets you say the whole thing without waiting for a reply that’ll come in broken fragments. And scheduled delivery means you can write it tonight and have it land when they open their eyes. That’s not just convenience. That’s care across hours they don’t have to share.