I have "joked" since I was a kid that my secret superpower is the ability to piss people off. I am the Antagonizer. I can literally just sit there, minding my own goddamned business, and people will get upset with that and come at me. They smell neurodivergence like blood in the water and they can not STAND it.
I have had this exact same experience my entire life, right up to the same feeling of complete shock and... I don't know how to phrase it. Difficulty comprehending? When I find myself in the company of one of those rare people who don't treat me like a termite in an ant nest and instead just, like, gets to know me, and likes me.
It's impossible to get anyone who hasn't lived it to understand just how absolutely and completely BIZARRO WORLD it feels to make a joke... and have someone laugh. To have someone willingly pick the seat next to you. To be invited into a conversation. To be liked, at all- not even in an over the top "this is my best friend she's the coolest" way but just in a "I am happy to have this person around and I'm not going to willfully go out of my way to misinterpret everything she says and every subtle mannerism of hers in the worst possible way" sort of way.
Because when you've got this superpower, that's what it's like. From most people, most of the time. You walk into the room and you're already tagged as an enemy. Some people are nice on day one but by the end of day three they don't want to engage with you and start muttering behind your back. You get alienated from every group interaction, up to and including official business ones. It doesn't matter what you say or choose not to say, it's never right, and SOMEONE will be upset about it. If you keep to yourself you're haughty, if you make small talk you're nosy, and they NEVER like you, and you're NEVER right, and you grow up just KNOWING that it's you. You're the problem. A rare friend or parent might say there's nothing wrong with you but you know in your heart that the only consistent factor in your problems is YOU. Everything you say and everything you think is poison, you're just loathesome like that, nobody wants you around, no one has ever wanted you around...
... and then you meet the right person, and, like. The superpower just doesn't affect them. You say things, and they hear the actual thing you said. You can talk to them. You can answer questions or offer suggestions and they'll listen to you. You can make jokes or be sarcastic and they'll be amused. You can be REALLY daring and be a little rude and they'll just laugh or shrug it off or just tell you that was rude and everyone moves on without treating you like a monster for it. And it's just as easy as the interactions that everyone around you have always had, and you didn't have to change a damned thing about yourself to get there. Because it turns out the problem wasn't you in the first place.
Sorry to hijack this with such a personal ramble but this specific "smells like termites" experience is one near and sharp up close to my heart, and I feel you. I am very glad that you got to experience such a fun wedding. You and your partner both looked fantastic in those pics and looked like you were having a genuine and wonderful time, and I wish you many many many more affirming get-togethers like this in the future.