I think he is undergoing a lot of different emotions and is not able to deal with them in a mature manner. You did nothing wrong, he is probably angry at himself not you. Besides FB is just a social media network, too much importance is given on blocking and unblocking and showing off on social media (this is my personal opinion). You can accept it if he adds you back. But before going back to him, please think whether he has really changed for the better or is he the same because he did send you angry texts (so that you dont go through the same breakup again)

But I must say you are doing great for someone who has been broken up just 2 months back You should definitely do the techniques (but only if you truly want him back, even if you slightly feel that you deserve better then take a break) This is just my advice, hope that helps