Fighting the urge again .... 

... to check his account 
... to open our email
... to see our photos together

~please, do not hurt yourself. keep yourself away from things that will make you feel bad. just go on with your life, do not spend your time thinking about a person who doesn't give a shit on you. Hold on to what keeps you alive, not with those that kills you each time. He's happier without you, keep that in mind. And you should be happy as well, even more. Do not give him the satisfaction of seeing you break down, show him that you're the victor, now that he's gone. You're free, never forget that. That's one of the best things you attained after he left, the most precious thing that was taken away from you by his existence. Hold on.Be happy. Stay strong.