anorexic x wants to help them get over their ed or smth where not eating is related to one of the characters
Hi ! I know of one title, this one, i haven't read it though. Hope that helps! xxx
https://www.mangago.me/read-manga/thank_you_for_the_meal/

Its a bl where the guy likes the guy he went to highschool with, but that guy is getting married to his previous students step sister and the guy who likes the guy from highschool starts talking to the previous students step sister
This?
https://www.mangago.me/read-manga/form_of_sympathy/