How do you tell someone you barely know you love them?

well a good way to start would be to get to know that person first because if you get to know them they will either a) turn out to be a jerk and you will have saved your self an embaressing moment or b) like you too then give them a card on their birthday saying "hey i heard it was your birthday have a good one!" a home made card will be best they will think you where really sweet by rembering their birthday and get to know you better