How do I get over my crush of 4 years…

I’ve had a crush on this person for over 4 years and I don’t wanna listen to my sad playlist on repeat everyday anymore…

Context (This is TMI go down for TDLR) :
We met on Discord in 2020 and I basically fell in love with them after just a few weeks. (And I didn’t even know…) After a year or so, I suspected that I had a crush on them but that I had lost feelings (no I didn’t lose feelings…) and I was like “thats crazy lmao let’s mention it to them”. Turns out they also had a crush on me… In 2023, they started talking to other people and those ppl were like flirty with them and I got like… jealous… (still oblivious) And I basically told them “Hey we should like act lovey-dovey to get them off ur back and stuff” and they agreed. Fast forward 2024, they told me that they think they have a crush on someone and I was supportive but I quickly broke down and FINALLY realized that I had a crush on them (still do dafuq…) And I also quickly confessed to them as well cause I can’t keep my mouth shut and they were like shocked that I still had a crush on them (me too…) and then I got rejected blah blah blah so now I’m here.

TLDR :
I confessed to them after 4 years of not knowing I had a crush on them and got rejected.

Throughout the friendship, (wait it lowk hurts me to type this lmao I hate this…) we referred to each other as husband and wife because we actually got platonically married and had a whole certificate for it but since I frfr wanna get over them we got a divorce (what do we do with the certificate now erm…) and um how do I say this… I still haven’t gotten over them… so like I’m kinda desperate to move on with my life and not think about this anymore, because I’m tired of listening to my sad playlist that I recently made to this situation and I’m also tired of thinking about them 24/7…