My boyfriend is going on vacation to Mexico?

Over spring break, which for our school is April 2nd-April 10th, my boyfriend of 9 months is going to Mexico for about nine days. We won't be able to text or call each other, and the only way we can communicate is over facebook. He told me the other day that he is afraid that while he is gone, my feelings for him will change. He's afraid that I won't like him anymore and that I'll realize I can make it on my own without him. At first I reured him that everything is gong to be okay, but now I'm really doubting myself. I started to think, 'What if he's right?' Everyone gets annoyed with their significant other, and gets in fights with them and sometimes goes through a funk where they think they don't want to be with them anymore or that they don't like them anymore. But what if he's right? What if I don't miss him while he is gone? What do you think we should do? We're both terrified...