Taylor Swift’s brother Austin is her “best friend” and the actor has been proving his unwavering love for her since they were children. Growing up with siblings can be a blessing and a curse depending on the day. There are the perils of being overshadowed, of the attention sliding off you entirely and onto them. Now just imagine your sister is Taylor Swift… you can predict such feelings might be amplified under the circumstances. And yet, the music icon’s brother, Austin Swift, has been nurturing her success from the earliest days of her promising career, beginning with a huge step the entire …