<human>: That pretty well sums it up.  Should I email him before hand...just like 'Uh, so yeah...things are going well, hope you're good, guess I'll see you at [Conference] in a few weeks!'

When it ended, it wasn't pretty.  We both did things I'm sure we both regret (I do, anyway...I said some pretty awful stuff to him).  We were together for a really long time, lived together for four years.  I'm happy in my life now...this isn't a 'do we get back together' kind of thing AT ALL.  But, it's going to be weird and I really don't want it to be weird.  Because we were together so long and loved each other, sure, but mostly because I'm giving a talk and knowing he's there is going to make it really hard to focus on that.  Thoughts?

Summarize the given text in a few sentences.
<bot>: Long term relationship ex is going to be at conference I'm giving a talk at, we haven't spoken in 7 years.  Things didn't end well.  What do?