Even if they seem to have the "perfect life" on the outside, it's impossible to know what's going on with them. Take any suicidal thought or suicide threat seriously -- even if you have doubts about how serious they are -- and contact a mental health care professional.
Many suicide hotlines provide anonymous assistance, such as the National Suicide Prevention Lifeline at 1-800-273-TALK (8255). Or contact the Crisis Text Line by texting TALK to 741741.