Thanks everyone for your support and comments, especially Sprigged and Otterpop. Glad to know I'm not the only one who feels this way.
Regarding the comments about "so-called friends": when you move overseas, you definately discover who your "real" friends are, as opposed to acquaintenaces. Only a handful of the 60 or so friends and family members on my "Christmas Card List" still keep in touch with us now that we've moved. The plus side: I cut down the number of cards I mailed this year to half, saving time, money, not to mention the heartache of trying to maintain a one-sided relationship.
I do miss certain American stuff like conveniences, real cheesburgers, lower cost of living, first-run movies and television programs, a real Halloween, Independence Day, owning a car and driving (too expensive for us in London), and personal SPACE (our little townhouse in Virginia is a mansion compared to our flat!)