I have a friend who has moved to the opposite end of the country so we haven't had much contact over the last couple of years. Ever so often I do get a round robin type email. I alwys send a personal reply. However, I rarely get a response from these. (even when I divulge some pretty heavy stuff in them eg miscarriage etc)
AIBU to a expect a reply and b, to think this person is no longer a friend if they don't reply.