It's certainly possible. You have to allow however, for human nature. I have male friends whom I find attractive, but we have a clear understanding of our friendship so all bets are off the table. But I still find them attractive, they are attractive people. Most of the time this question is actually 'can a guy and a girl be friends without eventually sleeping with each other'.
They certainly can. All it takes is a little self-control, confidence and acceptance =)