I can relate to what you are saying.

Have lived alone since later 20s (now 60+). Couple of relationships but didn't live together.

Yes, sometimes it would be nice to have someone there to cook for, talk to or just snuggle up together!

Unfortunately, if we're looking for friendship on social media, we can be lucky but most of the time it's full of people who are not nice. As a friend described it "...can be a cesspit at times". I'm lucky that I've chosen contacts very carefully, especially as I've been spied on by 2 sets of neighbours. Now I'm thoroughly vetting (as much as I can) anyone who wants to follow me and culled my existing followers list. Also, my contacts have same interests.

Yes, we do change as we get older and not just how we look in the mirror. Our life experiences are different as we mature. What was acceptable when younger, may not be now. Of course, health issues often play their part in how much we can do in later life....