I want to write a Christmas card to my crush and am not sure what to write?

My crush and I, according to a friend, already are really good friends and are very comfortable around each other. When I think about the way he acts towards me and things I notice him do, I, and other people, would naturally say that he likes me. I am just waiting for him to ask me out. I want him to be sure I like him so I want to say a little something in the Christmas card that's going to hint in the right direction, but not say "I really like you ask me out!" Any ideas?
Updates
+1 y
I wrote the card to him and gave it to him today (he leaves for home tomorrow). I wrote the typical merry Christmas and then added "I'll miss you over break. Hopefully we'll see each other some time." I don't know if or when I might hear from him.
Updates
+1 y
he said it was so sweet and that I didn't have to. When I talked to him last, we planned on studying, but just talked a lot. My BFF is cynical, says he probably doesn't LIKE me, but he FB friended her randomly last night after we chatted online
I want to write a Christmas card to my crush and am not sure what to write?
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