My [31F] friends [early 30s Fs] dumped me last year. They just invited my husband [30M] to a party without me.

I've been friends with Sarah and Angela for about 10 years. They started hanging out with a group of women they went to high school with after reconnecting at an alumni event in late 2016. These new friends are very much Mean Girls types, and have been pretty consistently rude to me whenever I've been around them, so at first I was turning down big group events every now and then, just trying to limit my interaction with this new crowd. As time went on, however, I realized that Sarah and Angela weren't inviting me to anything anymore, even though they were still including the rest of our old social circle. I figured I'd take the initiative and try to organize several girls nights and things like that with the two of them, but every time they blew me off, once even leaving me holding the bag on the deposit for a reservation.
I tried to have a conversation with them about it, but they turned the whole thing back on me, saying that they stopped including me because I never invited them to do anything. I pointed out that I'd planned multiple things with them, only to have them bail on me, and they pretended like it never happened. When I tried to discuss how badly their new friends treated me, they said I was being too sensitive, and I just didn't get their sense of humor. At that point, I realized there was no point in arguing anymore.
Then in the fall, Sarah didn't invite me to her birthday party (which I know she had, as she posted tons of pictures on social media), and every subsequent party since then. I figured it was probably out of the group for good.
Meanwhile, my husband is good friends with both Sarah and Angela's husbands (Brian and Dave, respectively). He was pretty mad about the situation on my behalf, but I encouraged him not to let it come between his friendships, so the three of them continued to hang out every so often.
I didn't think anything of it until he came back from hanging out at Brian's last weekend. He told me Sarah kept asking him about me, and telling him how much she missed me. Then she asked him if he was coming to the party next weekend.
I knew that he and Dave had made plans to hang out with some of the other guys in the group on that night, but neither he nor I realized it was a full-fledged party. He went back and looked at the Facebook invite, and, yes, it turns out that it's actually a party, Sarah and Angela are both going to be there, along with all of their awful new friends, and I am definitely not on the invite list. Needless to say, he decided he isn't going now that he knows this.
I honestly can't wrap my head around this. I don't know why Sarah made a point to tell him how much she misses me, while also making a point to not include me, again. I assume it's just a big stab in the back but it doesn't make sense why she'd bother when they've made it abundantly clear that they're done with me.
My husband also seems to be having a hard time coping with it. I feel bad that his friendships are being damaged over my stupid drama, especially since he's not very good at making new friends. He says he has a hard time understanding why Brian and Dave wouldn't have insisted on inviting both of us if they knew. Brian and Dave have always acted like they didn't have a problem with me since this crap started, and I was always under the impression that they didn't particularly like the new friends either. None of it really makes sense, it all feels extremely high school, and I'm not really sure how to proceed. Should I call them out on this or just keep ignoring it? Should my husband cut back on hanging out with their husbands?
tl;dr: My friends dumped me, byt my husband is still friends with their husbands. One of them told my husband how much she missed me, before they invited him to a party I wasn't invited to.


Source.