Unless you did truly awful things, which I can't imagine you did, such as beating her, telling her awful things, having affairs with other women, locking her up somewhere...you should release yourself from any guilt over her suicide attempt.    it was undoubtedly something that was building for a while and without a nice man around it might have happened much sooner. If she didn't tell you what you did "wrong" and you didn't knowingly do anything that the average person would consider abusive or demeaning to her, there is nothing more you could have done.

Do you suppose you are attracted to damsels in distress?

mg