My boyfriend has a close group of friends who usually celebrate their birthdays together. Two of the couples are pregnant, both due within the next month. Today they asked us out for dinner to celebrate my boyfriend's birthday (which was last week). I've managed to avoid them throughout their pregnancies but don't really feel I can dodge this one. Any advice on getting through the evening? They know we've had one miscarriage and one round of ivf that was unsuccessful but have never spoken to me about either.