I said it must be awful to feel like that, and left it at that.
BINGO! That's the right approach! Way to go!
Just for a laugh Google "It's Not About The Nail" ... so true.
Now back to the more serious stuff. My W has talked about suicide too. It's due to all the turmoil in their heads. I think that the turmoil is a good thing because it's not a comfortable place to be. She will need to do something to relieve the turmoil and she doesn't know yet that the thing to do is end the A and return to the marriage and reconcile. That may take a while for her to figure out. Patience....
M: 59 W: 53 M: 9 yrs T: 14 yrs No kids together but D30(hers), S27, S24, D21(all 3 mine) W moved out 11/18/2013 D-Day 12/14/2013 W moved back home 12/1/2014