What moment makes you feel that this person is a good friend worthy of lifelong friendship?

I want to say that this moment is a bit too difficult. Now that I think about it, it feels like a nightmare.

That was shortly after I started working. I work in the workshop office with two colleagues, one is the workshop director and the other is the operator. The three of us have a good relationship. Go to work together every day, talk about work and chat, and often go out to play together on weekends. Suddenly one night, I received a phone call from a colleague who told me that my colleague, the workshop director, had passed away. I was shocked at that time. Why? Isn't it nice in the afternoon? How can this be every few hours ... It turns out that after work, as the workshop director, it is natural to patrol the workshop. Unexpectedly, the workshop collapsed, but she was pinned under it. ...

In this way, a good friend left us. That night, I was busy with other people's affairs in the workshop, and one was in the hospital with her mother, the workshop director, for the whole night. There is no one in the hospital, only her, all the time! Always with the mother of the deceased.

Do you think such a person is worth making friends with? Until today, although we are no longer in the same unit, our friendship has not changed!