Did she share her reasons with you? Just curious about the basis for her wanting such a long delay. Is it just because this is new to her?
She's nervous due to our strong feelings for each other. She doesn't want to mess anything up, which I can understand.
The real question is "Is she worth the wait to you or is having sex right now more important to you than she is?" Everyone progresses or not in any relationship according to their comfort zone.
She's worth the wait, of course. I was simply posting to gauge whether or not I was being unreasonable.