I have a work lunch next week with my boss. A belated Christmas thing which was kind of him to suggest but I'm feeling nervous and awkward about it and what to chat about for 90 minutes. We get on and he's lovely and friendly but we usually just chat for a few minutes here and there, I am worried about awkward silences or waffling on about nonsense etc given it will be a longer duration. Not sure why I'm dreading it so much but I am, although I don't want to be rude and make an excuse. Does anyone have any advice? Thank you.