I share my blog on Facebook and have even written 2 books and link them on Facebook but I still rarely get comments or likes on my writing. Mental illness is a tricky subject and people are afraid of misunderstanding or offending. Are you writing for you, writing to get it out there, or are you writing in hopes of getting likes and comments? If you really want to see if you can get feedback, you could try making a "page" for your blog. I occasionally post excerpts from my books and get no feedback, but almost 100 friends have liked the page for my books.