This in my opinion is a classic situation where one simply must back off and 'Let It Alone'.

We often fail to appreciate that others are sometimes going through their own issues...we can't pretend to know what is going through others minds. If your friend blocking you was an oversight?... then they will rectify it in good time...If not?...then there are almost 7Billion other warm bodies on the planet.

Try not to take it personally..this is part of life.