This The Mentalist photo contains
business suit, street, city scene, and urban setting.
There might also be
well dressed person, suit, pants suit, pantsuit, dress suit, full dress, tailcoat, tail coat, tails, white tie, and white tie and tails.
The writers and actors don't want those two to get together. In fact, they laugh at the fans that want them to. Which personally I find a bit rude, but I won't get into that. Anyway, their reasoning for them not getting together (at least right now) is "they have more of a brother/sister relationship."
I'm sorry, but every time someone is trying to make an argument for why two people shouldn't be a couple, it's always either "they have no chemistry" or "they have a brother/sister relationship." But I've never seen anyone deny Jane and Lisbon's chemistry, so I won't focus...