If its not falling out on its own, you may want to go back to your dentist and get it removed. Can you wiggle it? Is it loose at all?
I can wiggle it a bit but then I feel it rubbing against the other tooth so I stop
Its hard for me to say but the other tooth is most likely the adult one and is going to be stable. Its hard to pull a tooth out that's healthy and stable. You can try to loosen the other one gently. If not, a dentist may need to remove it if you can't. Or you can try to eat an apple or something on it and see if it knocks it loose.