Who can save me

Depression is literally hell, but what's worst is that no one knows my thoughts...who can save me? I'm slipping slowly. She's gone, and I feel like I have no purpose anymore. What's the use ! I can't find something to keep me going, how have I managed walking around for so long now...I want to disappear. Maybe I can. Who can save me? Will someone save me before it's too late or can I figure out how to breath on my own?