<human>: I have to try to keep this short since I'm just on my lunch break at work.

Our mutual friend, we'll call her Brittany, has been friends with my wife and I since high school, although my wife and I didn't start dating until we were 21 and 22 respectively.

The last several months, I've been realizing that I have more in common with Brittany than I do with my wife. I can talk to her more freely than I can with my wife. She and I go on "friend dates" often where we go to dinner or to the movies or whatever, and my wife is obviously bothered by it. Brittany has been lying to her boyfriend about where she's going and who she's with when she and I go out. I'm truthful to my wife about what we're doing.

I admitted to my wife last night that I'm falling in love with Brittany last night, after Brittany told me the same. I love my wife, I care about her, and I don't want her to be sad. At the same time, I can't deny what I'm feeling towards Brittany. 

I feel like I'm stuck between a rock and a hard place here. My wife said that if I feel that way towards Brittany then I should go and be with her, but I know my wife. I know she'll self-harm if I do, and she's refusing my suggestions of therapy, regardless of whether we stay together or not.

Provide a brief overview of the text.
<bot>: I have to get through this situation with my wife, Brittany, and her boyfriend  somehow, and I have no clue where to start. How do I navigate this?