It doesn’t need to be perfect — feelings often aren’t. If your day-to-day self is no great wordsmith, don’t feel the pressure to turn into Jane Austen. Authenticity is everything — keep to the same diction and tone that you have in your day-to-day life, and don’t feel the need to imitate. They will be more impressed by seeing your true self in print than anything else.
Make the most of what you have in common
The carefully deployed in-joke is a key feature of any blossoming relationship. Knowing when to push their buttons, to gently nudge them about some trait of theirs you’ve noticed, or to give them some grief about a habit, demonstrates your attention to detail. Show that you’ve been paying attention, and feel free to drop allusions to your dates or (mis)adventures so far.
Place it carefully
On the mantelpiece for when they come home? Or accompanied by a leather-bound edition of their favourite book? Hidden in the bouquet of tulips from the market? Presentation is everything (our tissue-lined envelopes make a great start) and while the words will work their magic, consider whether another final flourish will help with your wooing.