I have 5 children and the youngest is 21 months old. All of our children were in bed with us (it was easier to feed them in the night that way). When they started 'making an "H" ' (one of us would get kicked while the other got head-butted), then we would have them sleep in their crib, in our room. Then, when they started "watching us", then we moved them to their own room.
Moving them happened at a different ages with each child. Some got moved to the crib when they were 4 month old, others were 7 months old. Moving them to their own room, some were 6 months old, others were over a year.
Each child has their own personality. Some of my children (mostly my boys) go to sleep and do great at bed time. When my girls were little, they would cry and fuss and try to get out of going to bed.
My oldest was in our room until she was about 2-years old (because of where we were living, would not have been my 1st choice, but all turned out fine) and then each child after that had others to be in a room with. Being in a room by yourself can be scary or lonely at any age. Different people and personalities handle being alone differently.
I say if both you and your husband are fine with her being in your room, and she is content and happy there, what's the rush? I'm not sure that I personally would want to have a child stay sleeping in my room past about 18 months.
Take care!