3. Change your mindset and your ally.
Studies show that usually, the hardest step when trying to forget about your ex is to dismiss him or her as your attachment figure, that is, the person that you count on for validation and support; your ally.
Try changing your mindset and understand that your brain can switch your attachment figure. Detach from them by replacing them with someone close to you, preferably a person that loves you unconditionally, like a parent, sister, or your own children. They can help you remember who you really are. Spend more time with them and train your brain to comprehend that closeness and intimacy don’t necessarily have to come from your ex.