I interpret the Bible according to historical/grammatical rules. It is to be taken literally unless the Bible itself tells me otherwise. Jesus made it very clear that heaven and hell are not metaphorical. If Jesus was wrong, then I would agree with anyone that we ought to toss the whole book!
We accept Romans chapter one to be the biblical position concerning homosexuality. I recommend a book entitled "Born That Way After All" by Johnny Nixon as an answer to the difficulties those with sexual identification issues.