How do I give up hope?

The hardest thing for me to let go of it hope that we will eventually reconcile or he’d come back.. because I love him so much for 4 long years. So many memories.. I can’t imagine myself with anyone else. He’s already told me to move on. So why am I stuck constantly hoping..? Im in denial, and delusional. I thought what we had meant more to him… it’s been 7 months since the break up, and I still find myself here on nights like this.. desperately waiting for him to come back. It hurts so much.