I am not sure about this but 'Raising a bat' came to mind
It's not that because the one who's a vampire is the bottom, and the top has some kind of blood that has specific effect to the vampire. The bottom lives with his uncle (a vampire too) and he's being hunted by a group of vampire.
But thank you tho (▰˘◡˘▰)
Nvm. Found it
K secret?
Yesss that one thanksss
I forgot the title but it's BL, the bottom is half vampire half human and there is one part where he had to be in the hospital because he keeps refusing blood so he almost died or something, and the top anxiously tried to find him again (he's a human). I think they re high school students. The half vampire lives with his long hair uncle who are full vampire, but they're kind. The uncle ended up being a leader of the new vampire empire or something