Divorce how to break it to her.?

[braidybean]

Ok I've been thinking about this for years 6 to be exact. I'm totally miserable in our marriage, I think she is too. We do not do anything together anymore, she's not interested in me at any level. She blames it on her depression. We have no common ground other than our child. The last time I left her she tried to do something stupid to herself. I am afraid she might try it agin if I leave. What do think is the best thing to do..