"I'd drive to the end of the universe to bring you back,” the musician's sibling wrote after his death at age 31

Ruth Gibbins said she is ‘struggling’ to cope with the loss and vowed to take care of his seven-year-old son Bear

Ruth Gibbons paid tribute to her little brother on Instagram, and recalled the times when she would pick him up after sold-out One Direction gigs, as she said he had ‘music in his veins’