I don't feel so bad. I've been engaged for 9 months and haven't told my family. We're having a VERY intimate wedding with only witnesses and possibly one other couple attending. Plus my family lives 900 miles away so it's not like they're involved in my day to day life, so they have no idea what's going on.
My mother will have a cow. She's a rather bitter woman and thinks men are pretty much useless. So I figure I may just wait until afterwards and tell her then. I just don't feel like listening to how, at 46, I'm making a huge mistake.