C.S.
Hi,
Good for you for allowing your daughter to stay in your bed all these years. But why stop now? My advice is to let your child lead the way. This means she has shared with you that she is not ready. It sounds like you are trying to work within a cultural expectation that says our children should experience night time separation to show they have achieved independence. However independence can also be achieved by attending to your child's needs, and fostering a solid foundation of trust from which they can confidently move forward in life. Many other cultures (who don't have our neurosis) co-sleep for many years. For mainstream advocacy on this issue you can read books by pediatrician Dr. William Sears. He and his wife had like 8 children and co-slept with them and allowed the children to lead the way. I hope you will continue to follow your child's inner wisdom.
C.