Mighty - it is these events that my xh now misses and wants back!!
But the good thing (for us) is that we get together and have a great time without him. To the extent that the children don't really want him back at these things: they say 'too awkward after all of this time' 'weird'. It is a sad mess.
You will be fine. Your xh not so much. I have said this before, I know.