Do YOU want to go to the party? If so, go. The double standard is bull...and do you want to live this way the rest of your life? He left the house, so what are you supposed to do, sit at home and mope?
I'm all for strategy, but not when it means compromising what you want for your life. If he were wanting to spend time with you, if he were even still living in the house, I'd think differently. But he will be gone behaving like a teenager again.
I say go.
SD
Me: 40 H: 43 H had EA from 2/06-9/06 Bomb 5/06 Piecing since 9/2006 3/2008: Boundary setting 7/2009: Boundary crossing~dropped my own bomb. 8/2010: Marriage finally on track!