After their plan to capture Red John goes horribly wrong leading to the gruesome death of CBI Director Wainwright on The Mentalist season 4 finale, Teresa asks Jane if he's OK. He tells her he's fine and then he takes her hand in his as the two deal with the latest of Red John's horrors.
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On The Mentalist Season 4 Episode 24, "The Crimson Hat" just before Jane must pretend to kill Lisbon, he hugs her tightly and says he loves her. He later claims not to remember what he said due to the extreme stress.
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Patrick Jane hit rock bottom on The Mentalist Season 4 finale. What lies ahead for this troubled man?
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Jane meets waitress Lorelei Martin on this episode of The Mentalist. "The Crimson Hat" is the 24th installment and season finale of the show's 4th season.
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The Mentalist Season 4 Episode 24 Quotes

Stuff just happens, that's all. Just one damn thing after another.

Jane

Lorelei: So you're not magician?
Patrick: No. I'm a con man. I steal from people.