The first thing that came to mind was this one, it's mostly just cutesy read but I love them
https://www.mangago.zone/read-manga/stalker_x_stalker_kadiro/
This one is one of my favorites of all time, I would say they're pretty obsessed with eachother
https://www.mangago.zone/read-manga/kabukichou_bad_trip/
Tysm mwaps!!!
checkmate
third ending
Why Ophelia Couldn't Leave
Stigma Effect
The Villain's Savior
Swallowing My Darkest Desire(BL)
December(Yaoi)
Love on hold (Yaoi)
An Uncomfortable Truth(Shounen-ai)
Give reco where they are both obsessed with each like plsss hdgsgsgsgs