This The Mentalist photo contains
business suit, suit, suit of clothes, two piece, two piece suit, and lounge suit.
There might also be
dress suit, full dress, tailcoat, tail coat, tails, white tie, white tie and tails, slack suit, and judge advocate.
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...