I have been on the same situation like you, you just have to delete all things that remind her, like her photos, accounts, phone no, etc..... i know its hard for weeks but nothing is impossible, try to change urself, forget about any of her, work on yourself, let this heartbreak motivates you to the success, and also remember karma always exist, someday you'll be successful then she may see you in public and she say ''i know this guy he loved me once , omg he have changed'' thanks