Marine:
I don’t think I’ve ever watched a straight up BL but I looked up Utsukushii Kare bc of your rec & I’m probably gonna give it a try! The gif is cute~
It's an unconventional (and in some ways, uncomfortable) BL to start with. The behaviour of the stalker ML is occasionally genuinely a bit creepy. The other ML is struggling to figure out his own feelings, and that sometimes leads him to speak or act more harshly than he actually feels. There are also a few moments that are a bit more mature (direct references to masturbation, for example) that you might not encounter in most BLs. But it definitely fits your criteria. The stalked ML secretly likes the attention and is upset when he doesn't receive it, and despite his harsh words he does genuinely like the other ML.