Letting go of someone is always a challenge after experiencing a breakup. There is no easy solution to forget about how someone hurt you and forget all the memories you had created together. But it is something that is important to do in order to give a new person the opportunity to connect with you.
There is always a countermove, always an escape or a way through, so there is no reason to get worked up. No one said it would be easy and, of course, the stakes are high, but the path is there for those ready to take it.