Amanda Knox credits her family as the sole reason she is able to endure the ordeal she has been through since 2007, saying today on "Good Morning America," "I wasn't alone" while being charged and convicted in the slaying of her roommate, Meredith Kercher.

Knox's family moved to Perugia, Italy, to be by her side each day during the year-long trial, footing the bill for every expense, making countless trans-Atlantic trips and disrupting their personal lives. But Knox's father, Curt Knox, said, "That's what you do as a family."

READ ALSO: Amanda Knox 'Doing Great' After Feeling Hated for So Long'

"When everything is this storm around you and you feel just like you're being pinpointed, it's terrifying to be alone. And I wasn't," Knox told Elizabeth Vargas in an interview alongside her mother, Edda Mellas, father Curt Knox and younger sister Deanna Knox.

Knox, 25, spent four years behind bars before an appeals court set her free. But all that time in prison made her realize how lucky she was to have such a supportive family, which she details in her new book, " Waiting to Be Heard."

BOOK EXCERPT: Read a Chapter of Amanda Knox's 'Waiting to Be Heard'

"I think one of the more incredible aspects of my time in prison was understanding that not everyone has that," Knox said. "And I wish it upon anyone, because that's who I am, that's who we were are, and I don't know how one would get along without it.

"It's incredible how much it makes a difference," Knox added. "Other prisoners write letters to each other just so they can receive that. And I got visits. The fact I got visits was an incredible thing."

Knox's mother said she was just doing what any mom would do to take care of their child in need.

FULL COVERAGE: The Amanda Knox Case

Now a student at the University of Washington in Seattle, Knox describes her life today as full of "wonderful" friends, a "wonderful" boyfriend and "great teachers." She is not, however, the same 20-year-old who traveled to Perugia, Italy, in 2007 to study abroad.

"I'm just a little more sober, a little more somber," Knox said Wednesday. "I almost felt that I was disappointing my family because of how serious [I was]."

It doesn't seem to matter to her family, though, because they're just happy to have her home.

"I'm glad it's passed and we're here now," her father said.

Amanda Knox 's memoir, "Waiting to Be Heard," can be ordered HERE and HERE.

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