Yes! I feel exactly the same and it's so nice to her of others who aren't desperate to move in with a man after 5 minutes of knowing them!
I was married for 13 years, together with him for nearer to 20 and although it was a shock to the system when he left, I haven't missed the physical presence of a man in the house.
My kids are young teens so I am rarely 'alone' but on the odd occasion when I am, if they are at their dad's and I am home alone, I love it!
I have a bf I have been with for 15 months and although we see each other EOW and a night in the week, I have no desire to move in with him. I like keeping my family time and relationship separate in the most part (they do occasionally cross over and that's fine).
I like being the only adult in our home and the kids feeling comfortable here, I like feeling like a grown up when I go to my bf's and leaving my mum hat at home for a couple of days.
Maybe this will change over time but I really don't think so. He is also quite happy in his own space, which is fortunate!
I guess what I'm looking for at this stage in my life is different to what I was looking for 20 years ago.
Saying that, I have a friend who has been with her partner around 7 years. No kids on either side, both mid 40's-50 and they live 45 mins away from each other and have done since they met.
They both have things going on where they live (jobs/homes) and are happy with seeing each other every weekend and a night in the week. Other people comment that they aren't committed to each other because they don't live together but I disagree. I think it's easier to walk away when you don't live together so to choose to continue shows a great level of commitment.