“You don’t want to tell me anything?” Owen is indignant

What a nightmare! Has his beloved little sister really grown up that much already? And while you about to ask what happened, Owen interrupts you.

"How did this happen?! Why did you start dating someone and even not tell me??" Owen stood in front of you, says an incredulous and pleading tone.

What you were afraid of happened. Your overprotective older brother found out that you started dating a guy.