Nice/good girls do anything they feel like doing. I used to be HORRIBLY shy sexually...so yes you can get past this. The fact is....what you and your H do sexually, is between the two of you....nothing is off limits if both of you agree to it.
One of the hardest things I found to do was to get past that first few times of trying something new/different for me. Looking back I was going for too much change...too fast. Try something small first that you've never done...whatever that may be. For example...I used to find it horribly uncomfortable to maintain eye contact while having oral sex. That's a good place to start....if that's something difficult for you....and it can be a real turn on for both people.
My advice is just don't go for something that would be a really drastic change to spice things up at first....you are likely to end up feeling really overwhelmed....just work your way into new behaviors. You might even just simply try positioning yourself in different ways so that your partner picks up on what you want. If you are comfortable doing so...tell him what it is you'd like to do. Or heck...here's a thought. Write him a brief note describing what you would like and then leave it for him to find (on the car seat, so he finds it on his way to work...or on the bathroom mirror). Then not only have you told him what you'd like to try, he gets to think about it til later.
As a question to you though, how comfortable are you with yourself sexually? I found that, for myself, until I became really comfortable with me and what I wanted sexually...it was hard for me to communicate it to...or initiate it with someone else.
I'm sure some other ladies will have some great thoughts for you too.
