Depends on all sorts of things.
Do you want to discuss it in general? I think that could be okay, depending on where the discussion goes.
Are you thinking about it? Well, that's really more the Personal Woes & Advice thread, anyway, and I'm not sure what the rules let us to do. If you think you're a danger to yourself, then probably the main thing we can do is direct you to sources of help, because we're not qualified to do much else.
Is a friend thinking about it? We can certainly discuss your feelings on the matter, but more technical stuff I expect we'd have to refer you to other resources.
(this is a non-mod's interpretation of the rules)