Break up (mention of suicide attempt)

I was with a guy for almost 4 years and we were engaged most of that. We broke up almost two weeks ago (I broke up with him). Tonight we talked for a bit and he told me after we broke up he came by my house and then tried to kill himself and that he almost died. I feel like this is all my fault. I feel like a horrible person because he felt so bad when we broke up. Now I’m very anxious and I’m constantly listening for his car. He says he’s going to talk to someone about our break up. I just can’t stop thinking about what he told me he did.