No, I don't think it means the relationship has a chance. I think he realized that what he was saying could have been interpreted as him threatening to harm himself and he wanted to reassure you that he wasn't going to do anything stupid.
I think he feels bad that you wound up not trusting him and he is feeling sentimental about your relationship and thinking about the good times and such. But it doesn't sound like you two are meant to be together. I would just grieve for the relationship and then move on stronger for your next romance.
Good luck.
Brought to you by Dating With Devon!