To me the swing itself is symbolic of mental illness, especially bipolar. It's essentially a pendulum, always moving between two extremes. The woman in the photo has managed to stop the endless movement between extremes, but still cannot quite escape the swing for the safety of solid ground. Her desperation to cling to her lost youth adds another layer to the photo. The swing has stopped, but she can't quite let go.

Great photo, layered with meaning. Thank you for sharing it.