He's glad that she does realize and apologize. Not the most heartfelt or in-depth apology, but it's a lot better than nothing. It frustrated him that she could clearly see how much it hurt him, and even then refused to admit fault, still acting like it was the right thing to do, no matter how much Ted had felt betrayed by it. A small sorry does help.

Before she has a chance to walk away, he pulls his hand of his pocket to take hers for a moment, giving it a soft squeeze.

"Be safe," he says softly, which is what he usually says when she's working a case, and he never really knows whether or not it's gonna end up dramatic. And if it does, he doesn't want their last words to be so cold. But... he still needs a little time to process.