@supertest156 A fellow fluff lover, huh? Great!
Here are some of the manga that have given me diabetes:
Karakai Jouzu no Takagi-san
This is a story about two middle-schoolers with one of them being really good at teasing the other. It has more than 100 chapters and has a lot of cute moments (for me, at least).
Link: https://mangadex.org/title/13108/karakai-jouzu-no-takagi-san
Karakai Jouzu no (Moto) Takagi-san
This is the spin-off of the manga mentioned above with the two of them now married and now have a child. If you want wholesome family moments that one can only dream of, then this is definitely for you.
Link: https://mangadex.org/title/21843/karakai-jouzu-no-moto-takagi-san
Kubo-san wa Boku (Mobu) wo Yurusanai
This is a story between a boy whose presence is barely noticeable by people and a girl who is able to see him without looking him too closely. The interaction between them is similar to Karakai but I think that there is more of the dreaded p-word in this series. You will also see top-tier pouts in this manga comparable to that of Nakano Miku in Gotoubun.
Link: https://mangadex.org/title/42390/kubo-san-wa-boku-mobu-wo-yurusanai
Senryuu Shoujo
This series focuses on a girl who communicates solely through senryuu (kinda like a haiku) and her interactions with the members of the Literature Club: a former delinquent who is interested in senryuu (the love interest) and their club president. It bears similarities to Komi-san because of the "cannot speak" kind of thing but if you are okay with this, then definitely do read this one. It is very fluff particularly in the early and later chapters but I do have to inform you that there are "rivals" that get introduced in the middle of its run.
Link: https://mangadex.org/title/22482/senryuu-shoujo
Pseudo Harem
This is a story between a senpai and a kouhai who are both in the Drama Club. Because of the senpai's wish to have his own harem (and also because she likes him), the kouhai acts out typical harem girl tropes for him. Despite the title, this is very wholesome and is a one-on-one romance, not really a harem. Out of all the manga I've read, this has the most progress. Definitely check this one out.
Link: https://mangadex.org/title/30945/pseudo-harem
Hope you like these! They're ongoing titles (sorry about that) but they're quite good (especially Kubo-san and Pseudo Harem). Also, if you're in the mood for LNs, try reading Otonari no Tenshi-sama ni Itsu no Ma ni ka Dame Ningen ni Sareteiru Ken. It's quite possibly the most wholesome, most heartwarming, and fluffiest thing I have ever read (Yes, i mean that no exaggerations). Happy reading!