Most Helpful Girl
I think she could just be trying to impress or connect with you better, since RP is usually about fetishes and desires. Given online RP is also a way to express your deepest desires without alarming anyone, as not everyone gets the RP affection.
from your description, you met a girl who you've grown highly interested and close with, which is great. Maybe instead of RP try to find out more about her. Talk with her, and try to avoid acting in RP for a while. Let her know you enjoy it, but you want to get to the core of her, and get to know who she truly is!
If you've never met in person, its very hard to judge her personality, characteristics, and herself overall just through knowing someone online.
Perhaps offer a different way to keep in touch? Maybe ask if she wants to have a Skype date with you? Or chat on a social media site? Something that gets you two more connected, and more like BFFs instead of putting the fantasy RP as something primary between you two.
As a female myself, no. There's SO MUCH MORE than sex out there. You don't have to like everything the same, but sharing a strong connection emotionally, and spiritually is important too! So give her a chance, and try to switch things up a bit in your daily chats. See if she'd be interested in connecting over a different site, and even with you calling her if she doesn't mind.
Give it time, and keep working at it! Hopefully you both can move past the RP importance, and focus on many other things relationship wise :)