Christmas letters are such a heartfelt way to express love, especially for someone as special as your boyfriend. I love blending humor and sincerity in mine—last year, I started with a playful roast of his terrible gift-wrapping skills (he once used duct tape on a jewelry box!) before diving into how much his chaotic energy brightens my life. Maybe mention a shared memory, like that time you both got lost trying to find the "perfect" Christmas tree lot but ended up laughing over hot cocoa in a random parking lot. Throw in a line about how he’s your favorite holiday tradition—corny, but it’ll hit right.
For structure, I’d avoid making it too formal. Scribble it by hand on festive paper, tuck it inside an ornament, or pair it with a silly stocking stuffer (coal-shaped candy if he’s been naughty!). If you’re stuck, steal a lyric from his favorite winter song or reference a mutual obsession—my guy got teary when I compared us to Buddy and Jovie from 'Elf' (yes, we’re that couple). The key? Write like you’re talking to him, not performing.