Wedding invite from my dad's third wife's daughter
Hey y'all, I just discovered this subreddit so I apologize in advance if this post isn't the place.
Background context. My parents divorced about 25 years ago and they did not handle it diplomatically. My dad rushed into a second marriage that lasted 14 years where he was emotionally and financially getting abused. My older brothers and I bared part of it.
About 2 1/2 years later he is married to his third wife (I'll call her S). She has two adult children that are engaged. I have spent a few holidays with them and overall they are genuine people. I received a wedding invitation in the mail this week from S's daughter. My adult brain knows it is an incredibly gracious gesture to be invited to a wedding. My child brain and nervous system feels exhausted as I dread having to socially interact with other guests and I anticipate some awkward interactions. What sort of social presentation am I supposed to have and how will I be treated in light of my dad's third family? I feel guilty if I don't go, and I feel anxious if I do go. I wish I enjoyed weddings more, but in my age I've noticed myself become more and more jaded around weddings and marriage.
Wondering if anyone else feels that way and what has been some helpful guidance/resources you've gotten.