midknightlove

Perhaps "Lover Boy". Athough the core wasn't the breakup itself, it was a pretty big thing. Another one maybe "How sweet is your sugar daddy". In a similar setting maybe "Escape Journey", or a quite tragic one "10 years where Ii loved you the most".
Again, I'm not sure if these are really what you're looking for, but I hope they help

Parhaps no similiar like driver's high but maybe you can try?

https://www.mangago.zone/read-manga/this_ending/

https://www.mangago.zone/read-manga/ways_of_parting/

https://www.mangago.zone/read-manga/life_senjou_no_bokura/ (this sh**t my favorite ╥﹏╥ but this is manga)

https://www.mangago.zone/read-manga/loss_time_ni_hanamuke_o/ ( this is manga too)

https://www.mangago.zone/read-manga/dear_teddy_bear/

Here -
https://www.mangago.zone/home/mangalist/1694666/