Hi H., I have a Child Develoment degree and I am a Preschool teacher. There are many different parenting styles, one of which believes that there is no problem with having a "family bed". The do this in many different countries outside the USA and it is "normal". This causes a problem when it is interfering with your life. It is heartbreaking and I am speaking from experience. It took my son 7 years to get into his own bed! When he was little, it was easier and we all got sleep. That is really important. But as he got older, it started to be a problem. The longer you wait, the harder it is. What we did, was we told our son he had to sleep on the floor. He did this for about a year. He was so uncomfortable, he finally decided to sleep in his own bed. Then I knew he was ready. I have friends that actually locked their children in their rooms and let them scream it out. Eventually, they would fall asleep from exhaustion. After a few horrible nights, the child would eventually get use to it but you CAN NOT give in. You have to show your daughter who is in control and show her love. A routine is great and Mom & Dad can give a bath, read a book, etc and put her in HER bed, stay for 10 minutes and then leave. If she gets up or screams you have to tell her how it is. This Is very difficult. Keep on putting her back in her bed. The problem with children falling asleep with their parents is habit forming and then they can't do it w/out them. If you sleep w/ a pillow every night and your pillow was taken away in the middle of the night and you woke up. Wouldn't you look for it and want it? It is the same with children. They just have to get use to doing it on their own.
Don't worry I doubt whe will be 16 sleeping with you.
Hope this helps.