I think you should support your friend. She has taken a big step in asking you out, and may feel that it is time to step out of the dark. Or maybe, she is a little confused as to what her sexual orientation is. Either way, she will need good friends to help her, as, unfortunately, there are people in this world who won't understand. Personally, I'm not bothered if someone's gay. In fact, I really admire them, because they are going against the whole law of nature saying that it should be male/female. Homosexuality is not a sin.