Ex trying to contact me


My ex and ended back in April and it was a really bad ending. Out of the blue I get a notification saying he added me back on Snapchat. He hasn’t yet messaged me but I feel like he will soon and if he does I don’t know how I should handle it. If anyone has any advice please give it

I don’t want to just block him for the simple reason if he try’s to contact me I would like to know. I just need advice on how to handle it if he does