Clever hints to give my long distance boyfriend that im surprise visiting him?

I agree with French Fry. If you don't want to tell him until it's 100% sure that you can come, great. But then don't tell him ANYTHING until it's 100% sure that you can come. All you are doing now with the little hint-dropping is torturing him. And that is seriously uncool. And you would like US to help find new and clever ways in which to torture him? Not happening.