I know they are just feelings but loneliness is a pretty powerful one!
It is pretty dam* powerful. I think it's something that just has to be gotten through, until it becomes easier through sitting with it. This is all part of the modern human experience, right? Of course, this is what I'm hoping.
I know just what you mean, it is really hard to go from being around people, to being alone in your house. We're social animals, we're not really adapted to it. IMO, this is why the breakdown of the family through divorce is so incredibly difficult, painful, and damaging--there's no set up modern social structures for people to be a part of when the nuclear family breaks down. Sure, you can belong to an organization, or belong to your friends and birth family, but it's not quite the same, right? They aren't really your partners, working towards shared goals & dreams. It's more like it's every couple for themselves...
OK, I could get really philosophical right now, but I'll spare you.
It is in the shelter of each other that people live.--Irish proverb