Hi!
First of all, communication is the key to any relationship. If you dont communicate well enough about this, how well are you going to communicate about other things when the time comes? Just a thought.
Anyways, about your question...Have you possibly asked her what SPECIFICALLY she likes? Have you been talking to her about it and said, "What pleases you? How do you touch yourself? How would you like me to touch you?" Also, can you judge by her reactions to your techniques what she likes more and what you should improve on? IE, does she moun louder when you stimulate her clitoris, or her g-spot?
Do you stick to the same moves all of the time? Or do you switch it up?
Just some stuff to think about!
-Mariah