Don't be afraid to speak up if someone is acting different such as being silent, distant, unlike themselves, etc. They may need a friend to talk to. Talk to them. Ask them how they are REALLY, not as a friendly conversation starter or to be polite. People are hurting, but it starts with YOU speaking up.
"The biggest mistake you could ever make is being too afraid to make one". Inspirational quotation which really speaks to innovation and risk taking. Isn't that what we're all about really in libraries? How many change workshops have you attended?