You have known Marty McFly your WHOLE LIVES since your mothers were both best friends since high school. When you guys met Doc Emmet Brown, which you both call Doc, Marty practically drove him CRAZY as a kid. Now, you both are actually dating. He asked you out as just 'friends' to go out in his truck and he confessed to you that night. So, yeah. One day, you and Marty were walking home from school before Doc's time-traveling Delorean speed-driven and recklessly hit the curb besides you both.