Who wrote we're going to be friends?
No context provided
Who wrote the song We're going to be friends?
Jack White
No context provided
Who wrote the book We're going to be friends?
Jack White
We're Going to Be Friends
https://en.wikipedia.org/wiki/We%27re%20Going%20to%20Be%20Friends
"We're Going to Be Friends" is a song by the American alternative rock band White Stripes from their album White Blood Cells. It was released in late 2002, and tells the story of meeting a new friend at the beginning of a school year. Through its lyrics, it is able to evoke the simplicity and nostalgia of childhood.
We're Going to Be Friends
Books
We Are Going to Be Friends (2017) – based on "We're Going to Be Friends" by White Stripes
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Jack White
John Anthony White (né Gillis; born July 9, 1975) is an American singer, songwriter, multi-instrumentalist and producer. He is best known as the lead singer and guitarist of the duo the White Stripes, but has also had success in other bands and as a solo artist. 
Jack White
"We're Going to Be Friends" is a song by the American alternative rock band White Stripes from their album White Blood Cells. It was released in late 2002, and tells the story of meeting a new friend at the beginning of a school year. The song was written by singer, songwriter, instrumentalist and producer, Jack White, who is the lead singer and guitarist of the White Stripes, but has also had success in other bands and as a solo artist. White also wrote a book in 2017 based off the song that shares the title.