Commitment is a four letter word... My little sister's best friend has always been off-limits. It doesn't matter how many times I've imagined what it would be like to be with her, she doesn't want me. She wants a clean-cut guy with a boring job who'll sit at home and answer her every beck and call. I know who I am, and I'm not going to change. Sure, I'd do anything she asked, but I can't change me. Not that she's...