This is why I stopped using Facebook for personal use. I use Facebook solely for marketing purposes for my online business where I use my fanpage and Facebook advertisements to promote my online website/webstore.

I understand how much it hurts to be blocked by people. In fact, being blocked by people on social media or forums is a prime trigger for me as it makes me angry and depressed; especially if I like that person or have otherwise invested a lot of energy into them.

The best bet would be to not take Facebook as seriously and step away from it for awhile. If that isn't possible, you could perhaps tell her that being blocked is hurtful and ask her to unblock you? It could work since it's been about a year and you realize that you might have been in the wrong (even though I don't think that you were wrong).