Defriend her. I don't think you have to defriend all your ex girlfriends or whatever from FB but if you're still having issues after 8 months and still checking her FB page, this seems to be a really simple solution.
I'm not sure the issue is moving on. You have to want to move on before you move on. You gotta learn how to deal with shit but you have to want to be able to handle shit first. It sucks your'e still heartbroken, but it's been long enough. You need to live your life now.