<human>: Can you condense the text into three sentences or less?

A manager at my work held a big party (for a personal, family reason) and invited everyone else but me (including the owner and his family). It is a small workplace and while I am okay at my job, I am not great, but it's pretty clear this is not a "career" for me. I am the newest employee but have been working there for several months and am on reasonable to good terms with my coworkers. We have spent the past several weeks discussing plans and preparations for this event. 

I am not personally offended - I had plans, and I would not have gone, anyways -  but I feel like it might be awkward at work (I work in a very informal setting where there is a LOT of social interaction). I'm obviously not going to ask outright, but how do I engage in conversation about the weekend, ask how the party went, etc without it being weird? I am mostly worried about this because my workplace is so "small business."
<bot>: Everyone else at my work was invited to an event; I am not personally offended but I do not know how to deal with it socially.