Tonight is the rehearsal dinner. Tomorrow is the wedding. He will be seeing his ex for the first time since the breakup (6 months ago) both looking all dolled up. While I sit at home as I try not to let my anxiety kill me. I trust him but I still hate it! Any advice?

UPDATE

I wasn't invited because the wedding was planned like a year before we met and the bride and groom don't have much money he didn't want to ask if I could come because it would be awkward. We have been dating 4 months..... so it's not like they can squeeze me in last minute when we only just became serious. But you guys saying that make me think he doesn't love me. He is a groomsman and she is a brides maid. They might have to walk down the aisle together!