I read this post and found it similar to another post about a guy with a very shy GF...the difference...the other post had sooo many replies that stated....LEAVE HER!
Not cool, especially if you are asking for advice with how or why or perhaps even just a word about what you did if you ever experienced it...and I am happy to see that no one actually chimed in and said... "Get the fuk out of that!!!"(or perhaps I'm really into this Ruffie Colada and missed it)
Awesome points made here, just wanted to add what I wrote but I will modify it so that it makes more sense to what you ask...
All good points...make her feel special and show her you care. Make her feel sexy without coming off with an agenda.
ONE WORD OF CAUTION: This just may be the way she is...don't give up if this is what you want...but understand...if this is the way she is...you may only be able to get her in bed, and that's it, no spice or fantasy and that may not change. She could be set in her ways. Honestly, you most likely have a good girl on your hands that will really take care of you...but sexually, she just may not feel confident and sometimes...and I do mean sometimes, you just can't change that no matter how she looks to you or what you say...if she doesn't feel it, it can be hard for her and you honestly don't want her to fake it either...it can be an up hill battle. I've been there and it was for me and I just wanted to share what my feeling were when I was with her. It was rough and it caused a lot of fights and misunderstandings. I'd try something new or better yet...I.e. She was into walking...so one day, I got up early, made some SPAM and toast for us both and said, hey, Let's take a walk after breakfast, she became quiet...I asked what was wrong...after asking why are you so quiet now...she replied, why do you want me to walk, are you not happy with how I look??? My reply...Not at all, I figured you like to walk, I want to walk with you, we can talk and just do something good rather than stay home on the couch...she opened up to the idea, but I really had to explain myself all the time and maybe it was how I was coming off...but then I would get notes, voice mails or texts about how I make her feel good and sexy, like a woman!!! Sometimes, I really really didn't get it...but I did try...and no, that's not why we broke up...but it's something similar that I thought I'd share.
Do what has been suggested and if you care about her...be patient, understanding and let her know that you are there, no matter what.