Why would you act gay sometimes? Do you consider it funny? Do you hang with people that find it funny? I know many people do find that funny, but the handful of homosexuals I know (of both genders) do not appreciate it if it isn't done by a known homosexual, and find it demeaning because it appeals to alienation.

It is a similar dynamic as to why black comedians can use racist language describing blacks and black culture without offending most blacks, but other races cannot. A person from a group making jokes is almost certainly bears no phobia or hate of thetheir group, but for people outside the group, phobia or hatred is perceived to be the most likely reason they area person is using pejorative language, demeaning stereotypes or laughing at behavioral or cultural peculiarities of the group.

To answer your question,

Don't ask. If you are worried about how to handle a romantic interest in yourself by your new friend, I'd suggest talking about yourself when the opportunity arises: Your female crush in school, or female celebrity you consider attractive, or, when talking about the future, your hope to someday find a girl to marry, and become a father.

You don't have to know his sexual orientation if he knows yours. The handful of homosexuals I know do not try to seduce known heterosexuals, they don't want to ruin their friendships. And like heterosexuals, nearly all homosexuals want sex with mutual desire: Nearly all persons would rather have sex with people that want to have sex with us, not somebody repelled by the thought.