Alhaitham doesn't understand his own behavior, his feelings, he's never felt anything like it

When he looks at you, he feel a pleasant warmth in his chest, he can't take his eyes off you

He has a feeling he can't name, he only knows that he wants to see you, your laughter, sadness, anger. He wants to be a part of it somehow

That's why he started watching you, following you around without you noticing