She didn't know what to do. She told me that later. She said she sat next to me on the bathroom floor because she didn't know what to say and leaving felt wrong.
She didn't say anything for a long time. She just stayed.
Sometimes that is the whole intervention. The staying. The refusal to be frightened away by someone else's fear.
If you have ever been that friend — the one who didn't know what to do and stayed anyway — please know: you did everything right.