One thing you're not making a distinction about, you're applying labels here rather than addressing actions. You can apply the label of sinner to me and be correct yet I could still be worthy to participate in any gospel ordinances, even including temple ordinances depending on my behavior. Am I repenting of my sins? Am I doing all I can to leave my sins behind me and behave in a manner consistent with one who has taken upon themselves the Name of Christ? Then yes, I am worthy to attend temple ceremonies and participate in ordinances. However, if I'm doing something serious enough to deny me a temple recommend, then no, I'm not ready.
Are homosexuals allowed into temples to partake in temple ordinances? Most certainly, as long as they're not participating in any sexual activity other than with someone of the opposite gender to whom they're married. I have a friend who is gay, but he has not had any sexual contact with another man since college decades ago, something he's repented for. He does, occasionally has sexual contact with his wife, a woman who was formerly in a sexual relationship with another woman. Neither of them are particularly comfortable and both have said they still have SSA, but they also have strong testimonies of the gospel and are committed to living the gospel. They have three daughters they are also raising in the church.
Do we know them all? Certainly not. However, we've been told quite clearly that there is to be no - zero, nada, nothing, nicht - sexual contact with anyone other than our legally wed spouse. He has also been clear that a spouse is ONLY to be a member of the opposite sex. A man may not be married to a man nor a woman to a woman. As such, any sexual activity between two people of the same gender is a sin, and there can be no ifs, and, or buts about it, no exceptions. A person may still feel they are homosexual, but if they are following the commandments they are welcomed into God's house. If they are not, they must first repent.We might discover later that we don't really understand what parameters the Lord has placed on his house.
It's not a question of what I want or what you want or what anyone else wants. God has been very clear about it. Homosexual actions are a sin and are those who practice them must repent before being allowed back in His presence. That does not, in any way, mean we are to treat people who are homosexual any less loving or kind or decent, and certainly someone with my past intimate history would indeed be a hypocrite were I to do so. However, I would not allow someone who drank alcohol to do so in my house. I would not allow someone to smoke in my house. I would not allow someone to use porn in my house.
I have gay friends, and whenever they're in town I love to have them, visit. They're always welcome in my house, and I love to visit with them. However, I would not allow them to share a room overnight in my house. That doesn't mean I love them less, but it means I want my home to be as free of sin as I can make it.
That is your right to decide for your home, I would not presume to tell you the rules to have in your home. However, in my home I will not accept openly practiced sin to take place. As a homeowner this is my right. It does not diminish the love I have for anyone but reinforces the love I have for gospel standards. I will not love someone less who sins, but I will not provide a place for them to do so.There is nothing wrong with allowing a couple to spend the night together in your home if they have chosen themselves to stay together.