Ugh! I'm sorry to hear that.
Why would you say that? I know several gay couples and they are decent people. I don't care if they want to get married or not. Two of the couples I know have been living together for 5 or 6 years, longer than some straight marriages I have seen last.
If they were decent people then they wouldn't be homosexuals. At best, they have been able to pass themselves off as 'decent' so far.
My wife used to say the same sort of things as you were because she worked with many homosexual men. She began to realize that I was right after overhearing many of the conversations that they would have with each other. They clearly were presenting a different face to their straight co-workers.
One tidbit that really made me laugh was their fascination with the Disney movie Beauty and the Beast. Some of them had seen it as many as 8 times when it was still in the theaters. Turns out, they loved to imagine they there were Bell. Maybe they figured the Beast would be too hard up to care?
I didn't say it but I'll still answer why I don't like it. They represent Godless sin. To be openly gay is to defy God. It is also to defy him is a perverted way. As has been said many times, we are all sinners, but to flaunt your sin is a very different thing.