You should treat a gay neighbor like any other neighbor - with kindness and dignity. Everybody is a sinner. We are called to be salt and light. That doesn’t mean you have to support their lifestyle in any way or even pretend you do. And if they pretend to be Christians then you really can’t socialize with them.
My brother was gay and we loved one another very much. Unless someone is in your face personally offensive, treat them as you would anyone else. I very much disagree with the Homosexual lifestyle, but that is no excuse to be hateful to someone.
Like that.
For me, hoping for a return to a theocracy in a secular world is a waste of time. Do I wish that abortion were illegal? Yes. Do I wish that the courts would stop continue to chip away at my Christian beliefs and rights to them? Of course.
Do I think that homosexual acts are wrong? Absolutely. But, I also believe that speeding, cheating one’s taxes or spouse are also wrong. Does that mean that I disassociate myself from everyone who isn’t walking the narrow line of a perfectly obedient Christian life?
Absolutely not. Christians are called to be, among other things, a light to those around us. If we expect those who haven’t given themselves over to God’s love through belief in Jesus to act like they have, we’re going to be bitterly disappointed - and those around us will judge, not us, but Christianity itself, by our actions.
I’m not advocating acceptance of everything everybody does, not by a long shot. But if you can’t be a friend to people and give them a chance to see the love of God shining out from you, they’re never going to even think to ask, ‘Hey, what is it about you that is so different from everybody else?’
Only then can you talk to them about what you believe, any why. Pray that God will open their eyes to seek the Truth, and leave most of the rest to Him.