It's good to show concern for suicidal people.
Dave and Bill are hanging out together when Bill tells Dave that he's in a dark place and has thought about ending his life.
Dave wants to respond to Bill's statement.
Dave tells Bill that he won't pretend to understand what Bill feels but that if Bill ever needs him he's there and that he'll help him find professional help.
Dave tells Bill that he should just get over it and get on with his life and that it's stupid to even think the way he does.
Bill feels relieved that his friend is supportive and sees a small light at the end of the tunnel making him temporarily feel a tiny bit better.
Bill feels even more alone in his misery and it deepens his depression and fuels his self loathing even further.