I think @ArtleyWilkins has a great idea: Instead of blogging you might consider journaling in a notebook. By the way, notebooks should be really cheap now because of the back to school sales for kids. Anyway, you can even carry it around with you; when you think of anything, you can journal about it.

Maybe write about why you are so angry with him and that you feel like running away from him. Only if you are up to it, journal about your traumatic experiences. Then when you see him, just give him the notebook to read from.

But, I think you should stay with him and tell him about all of the trauma that you went through. Hang in there. I know it is easier said than done. Go through all of this with him, so you can get relief.