I need good shounen-ai recs plsss. It should be like a realistic relationship that kinda v...

Try "Love for Sale" (￣∇￣")

https://www.mangago.me/read-manga/bad_contact/

https://www.mangago.me/read-manga/faded_first_love/

https://www.mangago.me/read-manga/the_two_lions/

(I haven't read some of these in a long time, but I'm preeetty sure they are all decently realistic in their relationships. Regardless, they're all a pretty good read anyway.)
Boys dormitory 303
19 Days
Castle Swimmer (more chapters on Webtoon app)
Peach Love
Here U Are
Covenant (more chapters on Webtoon app)

https://www.mangago.me/home/mangalist/476814/?filter=&page=9