Sometimes its the devil trying to kill people, when they are thinking of killing themselves.
You might consider getting help from a priest.
I remember how the devil tried to get me to throw myself off of a high bridge into a swift moving river one time,
many years ago. I just barely survived, and I did not jump off the bridge.
but I wound up going to a christian priest at the salvation army, that very day.
The priest did not really seem to know what to do.
But the priest asked me if I wanted to receive Jesus, and Jesus could help me.
I said ok.
Then the priest annointed my head with oil, and he prayed that Jesus would help me, and become
my lord and savior. He gave me a holy bible to read.
And I received Jesus Christ as my Lord and Savior. I then got help from Jesus after that,
to help with rebuking the devil.
I used to read psalm 91 out loud repetitively, asking for Gods protection.
No offence, but the religious stuff is really not appropriate - it's not "the devil" who makes people take their lives or harm themselves - it's mental illness (specifically depression), and this is something that needs proper help from a medical professional.
A priest may be a supportive figure for a believer (and without knowing the OP you don't know what his religious beliefs are), but they can only be there to "lean on" and should not be the primary source of treatment.