Here's a few ideas: Maybe you should not have sex for a little bit. Not too long, of course, but if you're used to it every night or so, maybe wait a week. It will give you time to remember why you like it so much, and will give you the opportunity to miss that kind of contact with each other. Also, do you tell her the kind of things that you like? If she sees you are open with communicating about sex, she may feel she may be able to open up a little more too. Lastly, try to bring it up when sex is NOT on the mind, i.e. not right after sex, during "pillow talk". Have a nice night together, have dinner or whatever you guys like to do, and then, when you're both feeling relaxed and comfortable, just bring it up. Tell her you love to pleasure her and want to make her feel good, and you feel that could be expanded upon by her sharing what she likes. If she is shy at first, suggest a few things you could try. Maybe you could have sex different places then usual, or watch a porno together. If she is a little more adventurous, bring whipped cream or chocolate syrup into the bedroom, or maybe silk scarves and blindfolds. Just make sure whatever you do, she is comfortable. You may have to go slow, but I am sure it will be worth it-for BOTH of you-in the end.

I know this was long, but I hope it helps!

*Cherry*