You have a lot of good feedback and advice going on here!
I personally used to fear the same as LittleGTO. That the more I shared, the more "definite" things became. It's not true. I have also always had issues with showing vulnerability and to me, sharing my situation and my pain meant that I would need to open up and show some of that vulnerability. I also feared people's reactions - would they reject me, my H, judge, etc. I was pregnant when H left, so I feared people thinking the worst of me, because after all, who would leave a pregnant woman, right?
All of the above - was just FEAR. Once I finally figured out the reasons why I was uncomfortable sharing, I was able to work through my fears and overcome them. The support I have found from those I chose to share with, which were only close people I could trust, has been invaluable. In fact, I know that I would have not made it without the support I have received and I am so grateful I allowed myself to be open, do a 180 and accept love and support from others.
I hope our experiences help you to at least feel like you are not alone, and hopefully also help you figure out the best approach for you in this situation.
Me & H: 44 D7, D6, S3 Together: 20y, M: 17y EA: 11/13/10, Sep: 12/23/10 EA becomes PA: Spring 2011 H filed for D: 09/06/12 D Negotiating began 2/15 OW seemingly gone on 3/15 Still negotiating D