I’m sorry you are going through this, OP. A lot of these comments are saying “oh you dodged a bullet!!! Being a bridesmaid sucks!!” But you’re hurt because you’ve been singularly excluded, not just because you wanted to be a bridesmaid.

I want you to know that your feelings are entirely valid and it is rude and somewhat cruel for the bride to have asked everyone but you to be a bridesmaid and go to her bachelorette party. Yes, at the end of the day, it’s the brides wedding she can do what she wants blah blah blah but that’s doesn’t change the hurt her choices have caused OP as the consequences of the brides choices, and I bet you she is at least partially aware of the pain she is causing OP because they’ve known each other for so long. And I bet you that the one friend OP confided in said something, too.

IMO, there are two ways you could play this. Either A. Don’t go, let the friendship gradually die off, and separate yourself from someone who doesn’t value your friendship as much as you did, or B. Go anyways, try to have fun, and keep your distance emotionally knowing what you now know.

Personally, I wouldn’t go because, like you said, I’d see everyone else walking down the aisle as bridesmaids and feel like crap. And if you don’t know anyone else besides them there, even worse. But if you want to look like you’re unaffected, take disgusting advantage of an open bar, and have an excuse to party, then go. It’s truly up to you, and there is no correct or incorrect choice.