So indelicately put.. Comes across (to my Euro mind) as an order doubled with an insult.
Or, you could try to be nicer when somebody makes themselves vulnerable to you.
When the target of your objectively reasonable directive is self-admittedly of the mindset "I could (A) get up and do it, or (B) kill myself", you may want to reconsider the wording.
Don't worry, I'm pretty stable these days. And seeing a therapist helped. To your point, it was someone else who booked the first appointment for me. So, if you know someone who might benefit, it'd be good to help them out with the process of finding a therapist.