How can I stop being an emotional affair while travelling?

I am travelling with a group of colleagues overseas, and seem to have trouble keeping my emotional relationship feelers from attaching themselves speculatively to guys in my group. There is a very small number of young people on the trip, and there are only two guys and one girl (me) whose significant others are either non-existent (theirs), or left at home (mine). My boyfriend and I have a great relationship at home, and I can't imagine a long term relationship with any of the guys I am currently casting out signals to. I can guess all sorts of reasons for my seeking attachment: We're in a country where none of us speak the language, we're constantly on planes and I am terrified of flying, and we all share very close interests and senses of humor. Luckily, I'm on Skype with my boyfriend every night, so I'm limited in my crazy, but I'm having trouble during group meals from making eye contact with a certain unattached guy in our group. We've been talking a lot in a platonic way, and I would actually like to keep him as a friend after the trip is over, but how to I keep cool as a friend (like my brain seems content to do), when the rest of my body is turning into an anxiety-driven emotional slattern?