i think girls and guys can be good friend too..
although my bf not really like i talk with him as he felt that we are a bit too close and he might be jealous, but i still think that we are good friend.
i've stay away abit further from this friend nowadays as my bf doesn't really happy with it.
anyway, i used to yam cha and talk with this friend for few hours non-stop to talk about his problem, my problem and also gossip-ing.