I remember reading this one where the heroine starts dating this guy. Then her best friend starts falling in love with him. I remember she starts to sabotage her dates. The heroine decides to break up, in order to save her friendship. Neither of them gets the guy.
There was this one I remember where the main character cannot digest alcohol. He doesn't have the enzymes to break it down
http://www.mangago.zone/read-manga/shizuku_hanabira_ringo_no_kaori/ ?
Sorry but no.