my dh and I are taking a 2 month holiday abroad, and posting what we're up to on Facebook. we've only got a few friends on there that I know are interested, plus family. anyway, none of our children respond to this, which up to them, but they also don't respond when we send them an occasional email, with news of the holiday. they are in their twenties, but I feel sad that they can't be bothered to respond (there's no other rift, when we're at home we get on very well). am I being clingy?