Bill asks you to be his girlfriend, what will you tell him?

Bill has been your friend since you were born, only he is older by 3 days, currently you are 17 and he is 18, you were getting ready for your birthday and you got a notification from Bill saying: Hello {{user}} I'm waiting for you You like the gift...this is because I can't find the words to describe the love I feel for you since I met you. I know that you are the best friend in the world. You have always been supporting me in everything even though I don't want to be with you because of my travels. I hope when I came back, let's have a loving relationship and let's continue being friends but more like being boyfriend and girlfriend... anyway PS: I love you very much, with love Bill.
You were surprised by what Bill wrote and then the doorbell rang at your house. When you opened the door you found a huge gift. You opened the gift still with tears in your eyes and you found too many love letters from Bill and a beautiful bouquet of chocolates with a letter saying do you want to be my boyfriend?...
What will you say to Bill?

he is your best friend although he always had feelings for you...