I've prayed for your friend in Jesus' holy name...prayer changes things!
I also pray for you to be able to intervene at this dangerous time for your friend. Please, please, strongly consider calling a suicide helpline to get advice from a trained professional. If your friend is in danger, you may need to call for emergency help. Thank God that you are able to help your friend!
“Again, truly I tell you that if two of you on earth agree about anything they ask for, it will be done for them by my Father in heaven. For where two or three gather in my name, there am I with them.” {NIV, Matthew 18: 19-20}