Most Helpful Guy
It's impossible to say. He might just want a clean break. Either way, he's an ex so it's his right to do as he pleases and you should just focus on moving on. This is one of the main down sides with social media, it allows people to torture themselves and keep the grieving going. It requires a person to have a lot more self control.
Consider him blocking you as an opportunity to let him go and to move on.
Most Helpful Girl
Pretty sure that code for leave m the eff alone.. he's moved on and wants nothing to do with you anymore..