'friend' A is getting married soon. I've known her on and off for 25 years. Got friendlier c.5 years ago and went out for dinner together every once in a while. Also went to same parties etc and chatted. For some reason in last year and a half she has gone cold. Stopped texting. Didn't invite me to significant birthday. No invite to hen night or upcoming wedding. (but maybe got vibes that I don't think much of her fiancé but have never said anything to her face)
Now mutual friend B, who I am much closer to has had her date for the wedding cancel and wants me to go.
I'd feel quite weird about it. But friend b is insistent that she has no one else to ask.