I've a watched lot of anime and I fav almost all of them! But since you're looking for something to watch, I'll give a diff option than the previous answerer.
Sekaiichi Hatsukoi (all of their movies • ꒡ • )
Semantic Error
FAKE
Kizuna
Kaichou No koi
Maiden Rose
Dash!
Close the last door
Ai no Kusabi
Angel's Feather
Boku wa Konomana Kaeranai
Uragiri wa Boku no Namae o Shitteiru
Koisuru Boukun
Sk8 (it's subtle but obvious, how should I explain (⌒_⌒;)
yes ka no ka hanbun ka
6 lover
Saezuru Tori wa Habatakanai: Don't Stay Gold...
Kono Danshi, Sekka ni Nayandemasu
Kono Danshi, Mahou ga Oshigoto Desu (you can check the list there's at least 4 or 5 of this "Kono Danshi" series)
Given
Fundashi Summoning
The titan's bride
Manly Appetites Minegishi Loves Otsu
Yarichin Bitch
Papa Datte Shitai
Dakaretai Otoko
Hyperventilation
Someone's else BL webtoon
Hitorijime My hero
Super Lover (there's s1 and s2)
Okane Ganai
Dramatical Murder
hYBRID child
Love stage!!
Vassalord
Tight rope
Koutetsu Sangokushi
Ai No Kusabi
Mirage of Blaze
Miene Liebe Wieder (have s1 and s2)
Sukisyho
Hybrid Child
Loveless
Love Pistol
SAINT BEAST (have s1 and s2)
Ottona ni Natte Mo
Princess Princess
Ouran Highschool Club ( not the main MC but the side character)
Tongainu no Ichi
Yami No Matsuei
Gakuen Heaven
Araiso Private School
Winter Cicada
Sensitive p*****
Hey! Class President!
Lesson X
Level C
Kasho no tsuki
Haru wo Daiteita
Gokujyo no Koibito
Fish in the Trap
Fujimi Orchestra
Earthian
Enzai
After School teacher's lounge
Boku no S**** H**** (tbh, not recommended)
There's a lot more but they're too BAD and not good for your own good (there I said it) I really didn't like how most BL just, throw rape and say it "yay, romantic stuff"
After you watch all these BL or some of these, PLEASE WATCH Makoto Shinkai or Hayao Miyazakai anime to cleanse your eyes (oh yeah, touch some grass too)
best bl anime you guys have watched? movies included