What am I missing- friendship advice?

So it's a complicated back story, I guess it usually is-
Basically I work with my ex of eight or so years, his twin brother, his dad, his twin bros dad in law and basically all the WaGs...(everyone is related or connected somehow).
It's a pretty tight knit work place and I have been there full time nearly ten years.

My beef is with the twin bro newly married.
When I was 19-25 I opened my home to him countless times, girlfriends kicked him out, he crashed at ours.
No employment, he crashed at ours.
I picked him up from late night emergency, pubs, drunken city trips, bar fights you name it. He was my partners brother and it was just how I rolled.

I don't begrudge him this, but, I wasn't invited to his wedding.
He met his wife when he was sleeping in my spare room. And I liked her!
Everyone in our group disliked her but I didn't hold her past against her, I thought she was good for him.

We were 25ish and she was just 18 when they met, holding her own, custody of her two little sisters, working and studying. I respected her balls for someone so young.
His best friend has said countless times behind his back he would happily run her over with a lawn mower.
The girls in the group constantly b*% ^ about her and her 'lowly' background.

These same people (who absolutely hate her and have up to the last minute tried to change his mind or make him cheat or leave her) have made up their bridal party! Best men and bridesmaids all!

You can bet I am no longer friends with these people but I work everyday sitting right next to twin bro and she invited me to her engagement party and all...
I just thought I would be invited to the wedding.

A girl she has never met who worked with us for about a year two half days a week and never met her or ever spoke to him in the work place was invited!?
But I wasn't....
Everybody at work went but I had to man the business two days by myself because of that and I didn't even realise it was because Everyone else was invited!
No one told me 😢

My feelings are really hurt. I don't know how to broach it because I don't want to reveal some of the nasty things these people have said when they so obviously are mislead about who their real friends are and I feel small and petty and mean for even thinking like this.

It's weird, I want to get over it and leave it and at the same time I want to wail whyyyy and be a big sook about it.
So confused.
Somebody pick this apart for me and slap me some perspective her

When the new wife of the twin realizes they aren't friends and cries on your shoulder..it's then when you say, I thought I wouldn't be invited to the wedding if I told you they were all backstabbing assholes! 😉

There was a reason you weren't invited, and I'm sure it had to do with those same people who backstabbed her. Just a feeling I get. Here's a thought though (don't know if it will help), but I put myself in your shoes, and I think I'd be more disgusted seeing the very same fake people who hate the girl standing beside her at the most important day of her life as well as celebrating with her. I would be sick to my stomach watching it and glad I was not invited.
(just a thought)

Coolcap- I feel you and thanks for breaking it down for me. I agree, I just feel hurt.
I can take a step back and let this play out, I'm not interested in starting anything... I just want to be a good buddy and I feel betrayed, and misunderstood here. And yes, I can guarantee the work factor would have been a huge card.
Maybe, they thought cos I was tight with 'em I wouldn't mind missing the big event but it really was hurtful.

LEB- haaaa man, I know this could very well happen in future... her realizing the truth I mean. Like you say I'm a shoulder, but I feel petty and mean because I feel like I don't want to offer that when it happens now.

^^^I do love me a Cancer gal, for this reason lol thanks Clueless for the support, it means a lot.

I wasn't sure if I was overreacting or being overly sensitive about the whole thing.
The wifey is a Scorpio with lots of Aries placements... I generally get along well with Scorpios and Aries people but this combination is playing off really fickle and yes -shallow.
For the fake popularity of mean people she sacrificed a friend who is real and got her back I suppose... *le sigh*
I got to harden up a bit, I will always welcome her with open arms though, cos she is young but a good egg and that's what matters.
My ex is a good bloke really, just shy of rocking the boat... understandable I think, its his brother and a big day... he got to support family decisions.
He is cool with me one on one, and with the current squeeze to, they met at the aforementioned engagement party and talked each others socks off for two hours over drinks lol... no drama there, so proud of both of them =)

Posted by LetltB
I think I'd be more disgusted seeing the very same fake people who hate the girl standing beside her at the most important day of her life as well as celebrating with her. I would be sick to my stomach watching it and glad I was not invited.
(just a thought)

This is how I feel, yes.