Why is it So Hard to Move On from a Relationship?

Hey everyone I’ve been struggling with moving on from a relationship and I’m really curious to hear others’ experiences or insights I was in a relationship for over 5 years and we broke up about 1.5 years ago Even though I’ve done things like deleting her pictures and trying to distance myself as much as possible I still find myself thinking about her constantly replaying memories and wondering what went wrong Logically I know the breakup was for the best and that it’s over but emotionally I feel like I’m stuck I miss her and I can’t seem to shake this attachment no matter how hard I try It’s been such a long time and I thought by now I’d have moved on but it still feels like I’m holding on to something that isn’t there anymore So for those of you who’ve been through a long term relationship and breakup what do you think makes it so tough to move on? Is it the emotional attachment the time spent together or something else? How did you eventually heal and find a way to move forward? I’m really looking for any advice or perspectives on this. Thanks in advance!