Well, I do think they can be friends.
I mean, it's kinda hard if the guy is cute and all, but it is possible. For instance, I have plenty of guy friends and nothing's weird, at least I don't think so. I've been friends with them for a very long time, and nothing weird has ever happened to a relationship degree. I don't 'feel' anything romanticly for them, so yeah. But, it just depends and all that. Some people can't have just a friend relationship with the other gender, but some can. ^^