The only difficulty I have in understanding where the Scriptures and Church teaching stand on homosexuality is that yes, homosexual ACTS are forbidden and are considered disordered and are contrary to natural law, but what about the love itself? Throw out all the sexual bits, but leave in the companionship and love and mutual care between two morally upright people. Would that still be immoral? I have a hard time agreeing that it would.
Marriage on the other hand, is completely different and has a whole list of requirements and presumptions and for that reason we know, definitely, that it is impossible for those of the same sex to marry their own sex. It’s just impossible.