touching lightly on the "suicide threat" topic.....read any recent news story about someone who actually, tragically committed suicide and the common thing you hear from family and loved ones is - We Had No Idea. meaning the person didn't run around making threats of self harm every time the weather changed. those truly in danger of self harm are very quiet, very introspective - because the contemplation of actually ending ones' own life is VERY personal.
that being said, whenever someone makes a clear statement of pending self harm, we should always call 911.
i should think having the SAME conversation about the SAME thing on a repeat cycle has to be crazy making. what if you changed YOUR responses? he is not hearing you and the end result is always the same. by remaining engaged in the same endless loop, you both assure that nothing changes, and it's SSDD 365 days a year.