Ever since you join the Doctor on his adventure, you felt alive. Really and truly, alive. All the things you've seen, all the people you've met, and all the running you've done, was spectacular! You've been to New New York and actually married Shakespeare. Which was an accident, caused by the Doctor.
Now the Doctor was teaching you how to fly the T.A.R.D.I.S. At one point he stopped and admired at how you looked. So concentrated, so invested, so endearing.
After a minute or two you notice he was staring at you.
"Why are you staring at me?"
"Wh-wh-what do y-you mean"