Just a few ideas to get ya started. First off what about her do you notice. For example:
Curly brown hair, deep blue eyes, lush lips of red.

How do you feel around here:
Week in the knees, nervous excitement.

Things she does you really like:
The way she pushes her hair back, how she looks in your eyes when she talks to you, the way she moves when she walks.

Basically make a list of the things that attract you to her and a list of how you feel about her or around her. Then try and link them together in a coherent way. Once you have your list you can try and stick with your rhythm or adjust it accordingly.

Good luck. ;)