I wish I could help him but I can’t and I feel stuck

So my kids dad and I are split for the last 5 months.. it took me a long time to finally leave. But he’s been telling me and texting me that he wants to die and how it’s my fault we didn’t work out. Now I took screen shots of our message last night. Can anyone tell me? I love him and always will and care about him so much but I also know I can’t do this..