They key to get her being crazy about you is helping her emotions become overactive. If she's always feeling the same thing about you, it's boring. If she's confused, happy, upset, and sad all in a short period of time while she's thinking about you, then she's not bored.
Women don't like to be bored.
Don't always answer her texts, don't always answer her calls, don't always tell her you love her after she says it, don't always fvck her in the same position, etc etc. Make her wonder how you feel about her. Make her wonder if you still see her as attractive as the day you met her. She needs variety and excitement from you in order to remain interested.
Women are crazy about the men they can never figure out. Women need to spend time with their brains, analyzing your every action and non-action. "Well, he said he loved me last week, but he hasn't said it at all since. Am I doing something wrong? Is he interested in someone else? Maybe he isn't feeling well. Oh, I'm so confused, but I love him!!!"
This is the 5hit that should be running through her head. If her imagination isn't being over-active, then you're not doing your job to make the relationship more interesting. She NEEDS this to remain attracted to you.