The 'Twilight' actress - who was caught cheating on boyfriend Robert Pattinson with married director Rupert Sanders last year - used to put up "walls" to keep people out, but now realizes she can use her "fears" to her advantage and wants to live life to the fullest.
She explained: "I have realized that you can close yourself off to life if you put walls up, but it's a difficult thing.
"You can't see over, people can't see in, and you also can't see out. So I've gotten quite comfortable with just being unafraid.
"I keep saying the same thing: it's not about being fearless but really just embracing the fears and using them. I don't want to deprive myself of any bit of life."
Kristen, 22, also recalled how "difficult" it was to put up her walls back up when playing the role of Marylou in 'On The Road', based on the novel by Jack Kerouac, and had to be "callous" in order to get the character spot on - a trait which she cannot relate to.
She explained to V Magazine: "Until you really get to know the woman behind the character, it's difficult to connect the dots.
"I'm a contemporary, sensitive, normal girl, and it's difficult to try and empathise with someone who seems to have a lack of empathy. She seems a bit callous in the book. She's literally the farthest ... I have never encountered a person that had their nerves so f***ing close to the surface."