How can I catch him off guard?

I have been with my guy for about 9 months. We had been very close friends before that for over a year. Anyway, we've done almost everything together. I'm moving away in a few days and I don't know when I'll see him again. I'm afraid it may lead to a break-up, even though I am madly in love with him. I want to do something different, surprise him, catch him totally off guard. I usually do the same stuff.. and I want to be able to pleasure him in ways he's only dreamt of. What do you think? Any advice would be great!
How can I catch him off guard?
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