I really think this is you caring and trying to protect her from harm. But you know, she has to go through every stages of life so she can come strong and independent through the other end of life. Let her tell you her feelings but don't force her into any kind of decision ( forcing the butterfly out of the egg will eventually kill it, not help it.) Support her and let her know you will be by her side in every walk of life. Bterefew, she will leave after a man sooner or later, so better get used to it.