Breakup is only hitting me after 6 months

D

I had broken up with my fiancé about 6 months ago and I cried about it for maybe less than a week at the time. I’ve been doing really well I didn’t care for him truly, I didn’t think about him, i was happy but this week it’s hit me pretty hard, as though it just happened yesterday. It hurts so much. It physically hurts, I can’t imagine a life without him. Idk why it’s taken 6 months for it all to hit me