can’t get over my toxic relationship

Me and my ex have been broken up for over 7 months now, we both mutually agreed to separate due to toxicity within the relationship. however, he continues to try to reach out but deletes the messages as do I. It’s been so long and I have yet to let this man go off my brain… it feels like my life has fully shifted to a negative change even though with him i wasn’t the happiest. I can’t work, can’t sleep, I can’t listen to certain music or go to specific places without feeling his empty presence.

any advice or is anyone else going through something similar? I can’t do this anymore.