Find - this is pretty common actually.

As LBS's suffer and agonize over the departure of the WAS, we tend to only think of the good times. It's clouded thinking at best.

When the WAS returns to the LBS, all of a sudden we can start to feel the anger that we've pushed aside for so long as we did everything we could to save the M. We also start to dial in on all bad things the WAS did.

Sometimes the roles will reverse and you can become the WAS.

I would suggest going to the party with W and do not have any relationship talks. Try to enjoy each other's company.

You have plenty of time to work on the issues you have with W but, IMO, now is not the time to rock the boat.