Can someone help me stop old ruminations

I have been having ruminations on a old crush for about 5 years now. I'm not sure how to combat it as it seems like my brains runs to making scripts as soon as I have breaks to myself. I find it sincerely awkward to constantly think of this person as I was ghosted. I want to move on but most decisions I intent to make in my daily life causes me to think about the old crush. Sometimes small things that looks familiar to them also causes the intrusive thoughts. I avoid maladapative daydreaming because the thoughts centers around the crush. I just want to save my spoons/ energy for something for helpful.

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