I sometimes think sunny think about basil more than basil think about sunny, even though most people see basil a bit yandare ,stalkerish. From the og I don’t believe he has those traits, you can say he is very obsessed, but to me is more of his desperation calling for help towards sunny, the only person known what’s he is hiding.

Basil is not as clingy , maybe emotionally but not physically. What I meant is he considers other feelings than him but at the last tree days it’s probably his limits.He behaves too well to the point he breaks and starts acting weird. A lot of people believe is, Basil was about to commit suicide after getting the photo album. He was already in a very low point of his life, if he is obsessed with sunny he would have wanted to see him one last time but he didn’t. But sunny appears, and he still probably decided to kill him self anyway, giving away his precious item to sunny even before knowing sunny is leaving. Then was the river scene, I personally think he might have the thought to drown himself after one last time seeing their old favorite hang out spot . But unexpectedly met Aubrey and her friends. (This might be more of a stretch)

Let’s compare the hiki route, where the last scene with the siren, many assumed it’s because basil still committed suicide, and that siren is for him. In this order, he probably didn’t get the photo album and trying to get it, before getting it the last straw was his grandma passing away.

All of these, there’s never any creepy clingy behavior of wanting , forcing himself to seeing sunny, he made up his mind very long time ago actually . And the only difference is sunny wanted to see him (or not