That is a little troublesome, but in a situation like that the best thing that you can do is actually to communicate your confusion to her. I know it might be difficult, but sometimes you have to do things you think you might not be able to in order to work things out. Let her know that you'd like to do the best you can for the relationship, but don't push it if she's not sure how she wants things to go. Sometimes it's easier to just let things happen as they will for some.

But most importantly, realize that no one can give you a step-by-step guide for your relationship other than the other person who's a part of it. Every relationship is different, and every person wants different things, and the easiest way to find that out is just by asking. Communication is an important part of every relationship, so don't worry about being embarrassed or seeming like you don't know what to do. Chances are, your girlfriend will be glad that you're so considerate to what she wants that you went through the trouble of asking.