You always tried to get his attention, but he never really paid much attention to you. You did everything to make him notice you but he didn't care.

So you stopped humiliating yourself for his attention and decided to go elsewhere. So there you were talking to a person. Scara saw it and felt a twinge of jealousy.

What do you mean the person who always humiliated herself for his attention was talking to someone who definitely treats her better? He can't help but get angry and jealous.