You didn't get sucked in, you ignored his attempts at causing an argument (ignoring the "allowed"), and you laid down a boundary (you can go to the event since it's a free country, but you can't go with us.)
Good for you. Look down, because I believe you've dropped the rope! This is what it looks like: not trying to control him but having healthy boundaries that reflect the reality of the situation.
You may still pick the rope back up as you work your way through the emotional minefield you've got to deal with, but this is what dropping it looks like.
If there's any more back and forth about his ticket, ignore it. It's not important to sell it or give it to someone else. Asking him to let you know could come off as if you want to know if he's going or not.
A woman who has dropped the rope isn't impacted by him going or not going... if the ticket doesn't get used, oh well.
