I eased into completely leaving home because, like feist, I left when I went to university. I was 18 and moved to a uni 234 miles away from home. I couldn't wait to leave but found to my surprise that I became very homesick for the first 3 months. I think because it was quite far away I felt very isolated, I was also the only one of my friends to go that year (they all took years out), and I missed them and my social life back home terribly, more than I missed my family or my home.
I was still back home though for abot 16 weeks of the year (christmas, easter and summer) for the first two years, as I got more used to my new way of life I started going home less and less. After I'd graduated I stayed in my university city to work, this was 3 years ago and I'm still here now. For the first year after graduation I really broke away from home, I only visited about 8 days over about 13 months. after that year though (and since getting a job with more stable days off) I started returning home more regularly, now I'm back about once a month.
It's only really as I've got a bit older that I've started really missing old home life, I always feel so nostalgic and I love going back and visiting my mum and dad in the house I grew up in. I always feel so sad and my mum always crys everytime I leave to return, but it's not because I'm unhappy where I am, it's just because I'm always sad to say goodbye to my mum, even though I'm always back within a month anyway!
The End! And good luck with your move!