Need to vent.
Long story short- separated from husband (H). Only moved out 2 weeks ago. Partial reason was his close friendship with a mutual friend, let’s call her A.
Was meant to be picking stuff up this evening. Texted H and he was in pub but said he’d be home in half an hour.
I was in the general area already so hung around and then lo and behold he text to say he had just ordered food and why didn’t I join him in pub.
I said no, I’m annoyed, I’m going home. Then I get a text from A, FROM HIS PHONE saying it’s her fault for ordering food, there’s a few of them in the pub and why don’t I come down.
But at this point I’m starving, got dinner ingredients about to go off, in sweaty gym kit and don’t fancy spending my evening watching H eat and drink.
Now I’m embarrassed that A has seen my stroppy texts to H and also annoyed that she got involved like that. Also I’m upset all my friends are in the pub and I’m at home alone. And I’m worried I’ve made it so awkward that no one will invite me out again 
AIBU to think that he shouldn’t have shown her my text and she shouldn’t have got involved?