A girl huh? In that case, How you doing?
</"Joey" impersonation>
Anyway, the way I look at it, the problem is really the same either way. Something is in place that is preventing your from growing spiritually. Usually, I have found that when we are about to really MOVE spiritually closer to God, that is when Satan will try his absolute hardest to distract you from your mission. Think about how easy it is to not go to church because you are just too tired for unknown reasons. Why can I easily sleep in until noon on Sunday, but I wake up at 6am on Saturday and during vacation?
Now, here is where it gets more interesting. Why is she being allowed to dominate the Bible study like this? Are you the only one concerned, or are others having the same issue with her, but are being too "polite" to say anything. Because, yes, polite attitudes have their place, but if she is distracting everyone from their focus and their growing, then she is being extremely rude and irresponsible. And the group needs to either stand up and stop it, or accept that they are no longer going to be an effective group if they allow it. Otherwise, if you are the only one bothered, it could be either something in yourself that you need to examine, or time for you to find another group.