Watch out for the mean girl
Try telling a guy that his girlfriend is not good and he will start thinking that you have feelings for him. They are tuned that way; they feel that they are such a catch, especially the ones who have already blown a maiden over. Unless of course, you have already established that you are only into girls. Then the equation changes and the guy teases you for falling for his girl; teases you, doesn’t take it seriously.
It is better to be friends with gay guys if you want to avoid so much drama. I don’t want to be sexist, but gay guys are the best ever friends a girl can ask for: you have common interests and generally no clash. I mean, what can be worse than a cisgender straight man in this age and time?