I had similar experiences.

I won't go into a lot of detail but I am totally not on Facebook anymore because of this friending, blocking, unfriending issues

I can't really give you advice, only that I know that my true friends are outside of social media - they will call me, visit me and most of all they understand me and my issues (and I will do the same for them). Sure we had our bad patches but if they truly care they will be there and try to understand. Just to add - I only have two friends I can truly count on the rest I would call acquaintances. And I'm fine with that.

Hope you work everything out...