I dont want to criticise, but maybe leave it to people who have read the book to say what its about. He doesn't brag and he acutally says that is the way he does it, but God may lead others in different directions.
It's a good book and by putting across and extreme perspective of "how Holy can we be?" rather than "how far can we push our boundries?" he really sheds light on Christian relationships.
Defininatly wouldn't recomend it as a devotional kind of thing... its not structured like that.
The opposite of Boy Meets Girl is probably Wild at Heart ... its more for men and its more about taking risks and really trying to LIVE, but good reading to god with Boy Meets girl.
To indulge in sin and let it control you is bad, but to do nothing for fear of sin is also to let is control you, so that is bad too. The middle ground is following God... I pray the both of you will find what God wants for your relationship