Should I be worried that my ex feels humiliated by me venting online?

So my ex and I broke up about 2 and a half months ago, it wasn't a long relationship, but I really fell for her during it; and though there were obviously bad parts to it, whole in whole its my first ever good relationship. Anyway she wants to remain friends, I think in time we may be able to pull it off, though for right now I just need time away from her.

From the breakup until now, I have been posting my feelings online as comments to Facebook pages that I know she doesn't follow, as I generally find it helpful to do such. I also never mentioned her by name, as most people on the pages are complete strangers, and regardless I don't have any real reason to call her out on such; especially when it is me getting over her, as based off the breakup her feelings for me faded, hence it ended.

Yet it was pointed out to me earlier by someone that they who also doesn't follow the pages in question that they could see what I was posting, and were generally concerned about my well being. But since they pointed it out I am now worried that my ex will be able to inadvertently see such, as I wasn't aware people on my friends list could see such. Should I be worried that I might have unknowingly stomped on any chance of my ex and I being friends in the future, and that given we can't exactly avoid each other easily be worried that it'll be frosty between the two of us in the future rather than civil?