I am not sure what the problem is?
That she may be in love with you?
That she isn't going full force all the time?
Are you living together? Or meeting often?
The thing is, no one goes about it top gun all the time. I guess it is a matter of what kind of relationship you have. Is she in charge? If so, I'd say it is up to her when she feels like doing stuff. If that is a problem, you two should talk and define the basis of the relationship so you are both on the same page.