Ask if they are suicidal
Be direct. For example “I’m worried about you and I want to know, have you been thinking about killing yourself?”.

“An angry friend is better than a dead one”. Never keep a “Signal of Suicide” secret or act alone when helping a suicidal person.

Listen to them
so they can release their pain and fight their hopeless self-talk. Accept that their feelings and way of seeing things are true for them even if they are different from your own. After they have talked out their pain they will be able to look at their situation and choices more cleary.

Help them get help
to deal with their problems. Ensure that they are committed to a Safety Plan. If they refuse, or you believe they will not follow through on the Safety and Wellness plan , then get help for them immediately.