No I didn't forget hehe.
May a wonderful and perfect day be granted for such a wonderfully nice person!
You honestly are responsible for making my year better than it could have been without you. I find it fitting to thank you for so much on your birthday and on the last day of the year. I cannot offer you more than that but I don't think there is enough that I could possibly offer anyway.
So back to it...have a great 21st birthday! I hope the night is one of your best and most memorable.
Love, Pete