No, absolutely not.
We are only just over the channel in Normandy and we have UK TV (as well as French), The Guardian delivered to our ipads at 5am, plus Twitter, Facebook etc.
We Skype /Facetime the family all the time (OH spent an hour last week helping eldest DGD with simultaneous equations). I hop across the channel for several weeks a year to see them and help DD when she needs an extra pair of hands. We don't see our grandchildren in Spain as often, but keep in close touch.
Some friends still visit, others have lost touch, but I guess that is the same wherever you live.
After eleven years France is very much home and when I come back here I leave the UK without a pang and swap instantly to my life and friends (nearly all French) here.
I think speaking the language fluently is essential and also understanding the country you live in and the way that it works.
I will always be English in France, but I don't feel I miss much about the UK except Waitrose. 