LUKE: Being jealous of Dean is pointless. You’re just gonna drive Rory away. You wanna have a relationship with someone, you’re gonna have to learn to open up your mouth and say something.
JESS: Give it a rest, Dr. Phil.
Dr Phil, previously discussed.
Having a girlfriend for a few weeks has certainly given Luke a lot of authority on relationship matters. This scene between Luke and Jess reads like Luke urgently giving Jess the sort of relationship advice he himself has badly needed during the show.
The Annotated Gilmore Girls 