Most Helpful Guy
The best advise i can give you is pure mind control.
Your mind will bring him up frequently, thats annoyingly how our bodies respond to the situation. This however is completely normal and also a good thing in getting over him.
Here is a key difference though between hurting yourself more and getting over him.
When your mind brings him up its fine to have memories but it is NOT fine to have fantasies! Fantasizing about how it could have gone, how great he is, how much you want him to be in your arms is going to get you more attached and hurt you more. Instead when a memory about him comes up steer your thoughts in a different direction. For example he pops up in your head because you used to have fun in the place where you are now. You can think back to the memory so your brain can process it but dont fantasize about what you would have done if he was with you. Instead remember yourself that he was not who you thought he was and he let you down. Remember that you want to move on from him!
For me it went different, i was in the situation where i really wanted someone who went for someone else in the end. I got a lot of comfort from the fact nothing was going to change between us, except for the possibility it ever being more.
I hope you get trough this soon! Feel feel free to send me a PM if you want to get it off your chest :).