Until you meet and get to know one another in person you should not commit to anything at all. I would be wary of someone who has never met you but is already trying to pass judgement on you and get you to change something that is a deep part of you. Stopping cross dressing is not like changing clothes. I believe that it is an integral part of who we are. Whether it is nature or nurture or both, it has made you what you are today and you cannot just cast it off.
I think a meeting is important whatever her view of your cross dressing. You cannot truly get to know someone via telephone and internet alone.