Really cute, warm and sweet. Somewhat like 19 days. The friendship part and the intimacy clubbed with the quirky moments make it a good read. I wanna read something like that.
Manga that make your heart melt. Recs plz? 😕

18 unlimited very similar to 19 days
Nanohana boys -not BL but very sweet
Ichi ni no San!
Ai ga love shite you nanosa
Bokura no shokutaku
konbini-kun
Hatsukoi wa gunjou ni tokeru
Anything by Furuya Nagisa, Hayakawa Nojiko and Tagura Tohru
Happy reading!

Arigato, zephyr4! Although I've read Nanohana boys, almost all manga by Tagura Tohru and 18 unlimited, I'd love to check out ur other suggestions.
😀