I think I'm afraid to post is when I feel like I've cried about what I want to post about once too often and I'm afraid people are sick of hearing about it.
OR when I really get into my post and it's really long and I think OMG-nobody's going to take the time to read this!!
OR when there are others who are going through so much worst that I sound like a little whiney baby who's crying about nothing and I should be spending my time appreciating that I am not suffering like they are.
There's more but that's all I'll write for now.