>>41100230 (OP)
They invited you ostensibly knowing that you’re trans. I say wear the dress, or at the very least wear feminine women’s dress clothing that makes it clear that you aren’t boymoding. People who already know you’re a tranny and see you wearing men’s clothing will not respect you more for it so you might as well make a statement and assert yourself.
Use this moment as a litmus test for who to keep in your life. Those who are nice to you matter, and those who are not are not worth your time or emotional energy. I hope you have fun at this wedding and can dance and drink and eat cake.
Be yourself and don’t spend your life in the shadows.