That's the thing. She doesn't need Tobias to protect her. She doesn't need anyone to protect her. Divergence aside, she's also Dauntless. And that means that she needs to be able to take care of herself. It doesn't matter that there's some small voice in her mind that reminds her how she's still keeping secrets from him. Or that, to most girls, they'd think it sweet that their boyfriend is trying to protect them.

She's not most girls. He's not most boyfriends.

Which means she's grinning widely when he lets go of her wrist. She wraps her palm over the section he had grasped. She rubs at the spot a little, not because he had hurt her (which he hadn't) but because the feel of his grip still lingers. They were both raised Abnegation. Touches mean something.

"No," she replies, purpose taking a backward step closer to the edge of the temple. "No, Tobias. You need to stop sheltering me."