Confused

Currently, I am reading a book entitled Why Men Love Bitches. I can't seem to finish reading the book because each page tells me that I am not a "bitch" and I am the "Good" girl. The good girl brought me to this state of being alone and left behind by the man whom I love the most. He was the best thing that happened in my life. I realized that I gave too much of myself to him and he didn't even gave enough value to it. I am thinking , do I need to change? Should I be a "bitch"? I know being a "bitch" is the best option but it makes me deviate from who I really am. 

I guess it may take some time for me to figure out what I should be playing. I think I'll be deciding when the right man comes along. For now, I would like to focus on my career and how will I make lots of money in the future.