got this from the book "this is me letting you go" by heidi priebe - which i also very much recommend - but to paraphrase, she says sometimes the biggest things you miss from a relationship are needs that are no longer being met, or ways you showed up/things that were brought out of you with x person that you miss, maybe moreso than the person themselves.
So, if you always went to art shows, finding another friend to connect with over that. Or if you only showed your vulnerable side with that person, redirecting and learning how to meet those needs for vulnerability with others. If you always laughed together, maybe watch a standup special. or if they made you dinner after a long day, order takeout when it gets hard and show up for yourself. etc etc on small and large scales! this is what saved me from the hardest times.
Plus also truly time as has been said. it will ebb and flow and everything is temporary - you will feel light again when the time is right! ❤️🩹