the friend couple that took her side and i didn't see it coming

split was relatively recent and i thought our group was gonna stay neutral cuz we've all been friends 6 yrs. nope. one couple in particular has gone fully into team-ex mode. she's invited to their things, i'm not, when i bumped into the husband at the gym he was visibly uncomfortable and basically pretended he didn't see me. i thought we were closer than that... it's honestly hurting more than the actual divorce some days cuz the divorce i saw coming. this i didn't. how do you let go of friendships that you thought were YOURS and turned out to be hers? do i confront them or just let it die... drinking too much wine writing this btw, fyi