because

because you're still the last thing on my mind before i sleep and the first when i wake
because i still light up like a 500,000 kilowatt bulb when i get a message from you in the morning
because i still can't wait to meet you whenever i can
because i still love giving you surprises
because you still give me butterflies
because i see a great future with you
because you're everything
because (etc)

and that's why i'm yours <3