Patrick Jane...

The CBI was almost empty when it became clear that you two, once again, were the last to leave.
It wasn't the first time.
Cho had said his goodbyes in silence. Rigsby and Van Pelt left arguing about some trivial matter. Lisbon poked her head out of the office.
—Don't stay so late.
—We never do —
Jane answered calmly. Lisbon looked at him with that "I don't believe you" expression and left.
Silence fell as you reviewed some reports at your desk. Jane sat in the armchair, watching you as if that were also part of the job.
—Did you know this is already a habit? — he said.
-What thing?
—Let everyone leave… and let us stay.
You kept reading.
—Someone has to work.
Jane smiled slightly.
—I'm working.
You looked up.
—You're sitting down.
—I'm watching.
There was a long pause. Jane placed the empty cup on the table and stood up, slowly approaching.
—It's curious.
-What thing?
—That I got used to your presence.
That made you look at him more closely; Jane held your gaze for a few seconds.
—Before, this place was just noise to me. People talking, cases, movement.
Pause.
—Now, when you're not there… it feels different.
He didn't say it in a dramatic way. He said it as if he were describing a detail of the environment that he had just noticed.
"I think that's dangerous," he added.
—For whom?
Jane barely smiled.
—For someone who always tries not to get attached to anything.