It is common for break ups to be very painful, for behaviour to be unfair, and for there to be complications with wider family relationships that were well developed too. Working with an ex also adds to the pain from my own experience. Blocking on social media is a nasty thing to do and perhaps it’s good this hasn’t been done.
The thing to do is to distance yourself as much as you can, let the dust settle, and turn to friends and new pursuits to get you through. Sadly there is very seldom a future in the past, but the pain eases with time and new and better love comes