Most people here are trying to come up with ways to convert gays. But realistically, most aren’t going to convert. If they are already Christians (which about half are), they probably have already decided that being gay is compatible with Christianity. You may convince them it’s not, just as you may convert the non-Christians. But in most cases, that won’t happen. They will think of it as like a racist trying to convert them to racism. (Please don't argue about whether this is a fair comparison or not. I'm just saying that if you want to understand the reaction of gay folks and those who accept them, think about how you'd react to a racist. They're probably going to accept the analogy even if you don't.)
So you should think about the most likely case. Suppose you have a gay friend who will simply never accept your arguments, and in fact who sees those arguments as a sign that you need conversion yourself. Can you still be their friend? If they are Christian, can you accept them as brothers or sisters in Christ? If not, what kind of attitude do you have to someone who is Christian but who you can’t accept as your brother? If you think rejection of homosexuality is an important part of the Gospel (and it seems that most conservatives do), then according to Paul, you actually shouldn’t have any contact at all with such a person. Are you prepared to do that? If not, are you willing to accept this as something about which Christians can disagree?