Sorry this is happening now Lexi... or anytime! When you share in group, just keep it about YOU and not him, because it really is. If he takes offense, it's better in group than alone! (And that would be HIS problem- taking offense)

There are at least 2 sides to telling him: the one you mention, and another I can think of right now. What if he takes that information to "manipulate" you, shame you, control you.. etc because then he knows you are triggered. It's a terrible thought, and I sure hope you have a better relationship than that.. but if I don't say it, maybe no one will?

Be safe!