I made him promise to follow the rules.MACKENZIEI didn't want his help. The last thing I needed was to spend my time thinking about my best friend's older brother. Falling for him was off limits. When it became harder to stay away from him, I kept it a secret. I knew we'd stumble eventually. Would we be able to catch ourselves when we did?BRYSONMaking a deal with my sister's best friend was a mistake waiting to happen. She didn't want to admit she needed me, but I couldn't walk away when I could help her succeed. I was determined to make her see herself through my eyes. She told me to promise that I wouldn't fall.I wouldn't make promises I couldn't keep.