Of course girls and guys can be friends!
I have a ton of guy friends. And in my opinion, they're better friends to me than my girl friends will ever be.
Some girls are always so judgmental, and boys... well, they're not.
But, things can get very frustrating when you're friends with a guy and everyone assumes that you're dating... that happened to me last year, and those were like the worst two months of my life. >.<
Everywhere I go, it was like, "Are you dating Robin?" "You and Robin should go out." "You like Robin, don't you?" "OMG, ROBIN LIKES YOU!!!"
It's like, SHUT UP!! >.< We're not going out, we're just good friends!
Some people just don't seem to understand that..