Most Helpful Guy
You should at least just send him a message first telling him your change of heart before you go off blocking and ignoring. It's not nice to let him linger around thinking you might just be busy or something. "Set him free".
Most Helpful Girl
yes, that's kinda selfish. if you guys are in a relationship they deserve some closure and a conversation. you can break up with them, and THEN do all of that stuff.