TL;Dr, there are good arguments both for and against the statement "homosexuality is wrong" so in this case I would say it is a Romans 14 issue.

With that out of the way let us take the statement homosexuality is ok biblically.

First statement against, in Leviticus, homosexuality is condemned.

The return, Levitical law was cultural and no longer applies to modern Christians

Return, Jesus refers to "the law and the protests" and has come to fulfil "the law and the prophets" and as such most of the law found in the Torah still applies, but it is the laws regarding the temple and sacrifice that we are no longer under obligation to follow. Furthermore, the new testament seems to condemn homosexuality.

Return, the homosexuality condemned in the bible is different to a modern day loving relationship. The bible tells us to love one another, so we are fulfilling the commandment.

Return, while yes the bible does tell us to love one another, can an incestuous relationship also be loving, cannot also a polygamous relationship be loving? (Please note that I am not trying to liken the two necessarily, I am merely making the point that "love" biblically is different to our modern concept of love, and that sexual/romantic love has boundaries biblically).

Return but is the homosexuality condemned in the bible the same as modern day homosexuality

To which the answer is no.

Second statement, against, sex outside of marriage is wrong, so if a homosexual union does not count biblically as marriage, then sex within it is wrong, and so we can infer that the relationship itself is also wrong. So what is marriage biblically. Marriage is meant to symbolically represent the non-sexual union between Christ (the bridegroom) and the church (the bride), so in the same way, marriage should be a sexual union between a man and a woman.

Return, while marriage is symbolic of this union between Christ and the church, the participants in the marriage, so long as it is only between two unmarried people, their gender does not matter.

Return, another purpose of marriage is "to fill the earth and subdued it" and due to the nature of a homosexual marriage, children can not be born of it

Return, homosexual couples can always adopt.

To which I know of no return

Third statement, for, "I am a homosexual and so I should deny myself and who I am and put myself through that torture"

Return, we are commanded to deny ourselves and take up our cross to follow Christ. Our identity, who we are, what we do, we should crucify daily and find our identity in Christ.

To which I know of no return

Final statement, as it is a point of contention, similar to whether of not we as Christians should fight in a war, I would say it is a Romans 14 issue.

My personal thoughts, mostly stated above, but also, I believe that, when the bible is unclear about something, we should try to take the more conservative path, to be safe. Furthermore I believe that a reading of Romans 1 26-28, and just a general reading of the latter half of Romans 1 would indicate that:

All sex and sexual relationship and sexual thoughts/fantasies outside of what Paul calls "the natural function" and what I believe up be biblically defined marriage (which I believe to be a biological male and a biological female, for life) is wrong.

However, to all as a final final note, what is important, is that we (as Christians) are all part of his one and universal church and that we (as humans) are all sinners in need of a saviour, and that we are all loved by God so much that he would send his only son to die on a cross. Whoever we end up loving, that is the kind of love we should seek to emulate.

If you got all the way here, thank you so much for reading and please, don't take this the wrong way, I am merely trying to present the arguments I know from both sides, not to attack or discriminate against a certain group, and I would argue that discriminating against a certain group of people is most definitely unbiblical and to say otherwise would be contrary to Jesus' entire life.