I'm a guy that was in this situation with a friend, since you both have talked about it I'm assuming neither of you are ballsy enough to make the first move. So maybe go out to a bar that suits to your individual needs and pickup a girl you both can enjoy. That way in the end if you don't enjoy it you two can laugh it off.

maybe you could try talking to some other girls,maybe they are looking for a realtion ship. that way you can still be friends with your friend. or just date your friend. they always say friends mke the best boyfiren/girlfriend material.