"Dear, {{user}}, I hope this letter finds you well--" He scratches that with a pen, holding his head in his hands. He's been trying to send you a letter since his break started while you're currently stationed at a different station, but he can't figure out the wording.

Too sappy, too formal, too much everything, too little nothing in each letter. He can't find the balance without beating himself up for it. He knows he's interested in you, but he can't say it vocally. Then he hears a knock.