This one's for your people, not for you. Send it to them instead of explaining - you don't have the energy, and it says the things that need saying.
If someone you love is grieving
Show up. Not "let me know if you need anything" - grieving people can't generate task lists. Just do a thing: leave soup, walk the dog, sit on the sofa and watch their television without needing conversation. Presence outranks eloquence every single time.
Don't fix
You cannot fix this, and trying to will make them lonelier. Skip the silver linings, the "at leasts," the reasons. You don't need good lines. "This is awful and I love you" is the whole script.
Say the name
People stop saying the dead person's name for fear of "reminding" them. You cannot remind them - they never forgot. Saying the name out loud is a gift; it says the person still exists somewhere outside one grieving head.
Keep showing up after month one
The casseroles stop exactly when the numbness wears off. Put a note in your calendar for month three, month six, the anniversary. The friends who show up late in grief are the ones who get remembered forever.