When I bought my own place and moved out of my parent's house for the first time in 25 years, I thought I'd get homesick. It didn't really happen. It was MINE and I was kinda excited about the idea of having a place of my own. No one else to share a space with. No one else to clean up after. It was about a 30-minute drive from where I grew up so it's not like I went far. So, surprisingly, I didn't miss home. Still don't.
I have gotten homesick on long trips. Both times I visited the UK, I eventually got homesick. I think it has to do with wanting to sleep in the comfort of my own bed. I don't typically sleep as well in a hotel (or at a friend's house, or wherever) as I do at home. I can handle a short vacation. I've taken trips in the last couple of years where I was gone for maybe 4 days and I never got homesick. But spending nearly two weeks in a foreign country was enough to make me miss my normal surroundings and routine. The thing is, I love the UK and want to go back. It's not like I didn't enjoy myself.
I'd like to go back to the UK again and see if I get homesick this time around. Perhaps I've grown out of it? Maybe I've now traveled enough that it won't hit me?