What do you do when you know you're about to see your ex again in a social setting?

I was invited to an event and I accepted, not realizing the person I asked is directly connected to my ex. (Before I realized I offered to help out with the event, blah blah, so now I feel a little stuck.)

Anyway, I'm going. My go-to thing is to simply brace myself then (1) smile and be pleasant/social with everyone and (2) look right through him as if he's just another piece of furniture in the room.

I might bring someone with me. I'm not sure yet.

What do you do when you know you're going to see your ex?

What do you do when you know you're about to see your ex again in a social setting?
Post Opinion