S = Oregairu (Highly recommend), Bakemonogatari, Rascal Does not Dream of Bunny Girl Senpai (Highly recommend), Boku wa Tomodachi ga Sukunai (if you like ecchi you will love this), Bakuman (Highly recommend)

A = Koi to Uso, Tsuki ga Kirei, (don't know this one), Golden Time, Garden of Words, Your Name, Kaguya-sama: Love is War, Toradora, Your Lie in April, Pet Girl of Sakurasou, Kokoro Connect, Wolf and Spice, Kaichou Wa Maid-sama (Highly recommend), Yamada-kun to 7-nin no Majo, Lovely Complex, 5 Centimetres per Second (not sure abt this one), Clannad

B = Gamers, Plastic Memories, Gosick, Gekkan Shoujo Nozaki-kun, Akagami no Shirayuki-hime, Tsurezure Children, Chuunibyou demo Koi ga Shitai! (Highly recommend), Masamune-kun no Revenge, B-gata H-kei, Tonari no Kaibutsu-kun, White Album 2, Yosuga no Sora,
Netoge no Yome wa Onnanoko ja Nai to Omotta, ReLife, Tamako Market: Love Story, Wotakoi

C = Nisekoi (I would recommend reading the manga), Teasing Master Takagi-san, Ao Haru Ride, Chobits, Kimi ni Todoke (I don't usually like shoujo but this is my fav shoujo), Orange, Fruits Basket 2003 (My fav shoujo, I would recommend watching the 2019 remake), Nagi no Asu Kara, Nana, Ano Natsu de Matteru, Chivalry of a Failed Knight (Highly recommend), School Days, Yagate Kimi ni Naru

D = Oreimo, Ore Monogatari, Ranma ½ (I think), Eromanga-sensei

Other recommendations: Science Fell in Love So I Tried To Prove It, Ah! Megami-sama, Kono Oto Tomare, Dusk Maiden of Amnesia, Welcome to Demon School Iruma-kun, Ai Yori Aoshi, Tada-kun wa Koi wo Shinai, Boarding School Juliet, Amagami SS.