With all due respect that's not something I feel like I've said

I don't think you or anyone else have/has a poor relationship with people just because you have a rule that if you're unmarried you don't sleep in the same room if they are staying at your home. I think it's fair to say it could be affected (general way not to any one person in particular) but I don't make the automatic assumption that it is.
Telling someone "you're not married you need to sleep separately, I believe/don't believe in ________" is imposing your view. You have a belief, you want others to abide by that belief by doing/not doing X. If you define it as something else to you personally please don't hesitate to clarify. And for me I'm not saying it in a positive or negative way.