Writer's block

I feel that urge to start writing beginning to resurface again, but it has no direction, which is the story of my creative writing life. Bits and pieces materialize but then go nowhere. I have so many unfinished manuscripts it's scary. I'm my own worst enemy, putting walls and blocks up to keep myself from finishing a project. Is it a fear of success or a fear that all of my vulnerabilities as a human being will be exposed? Sure I can mask them within characters but someone will pick them out surely and then I would forever hate myself.