I am a shell of the woman I once was.
Why have you changed?
I was once rich and covered in jewelry.
Circumstances can change over time, and while it's hard, you shouldn't feel like you are a different person.  You are still the same person you were before, but it might take some work to get back to the same lifestyle.
I wish I was still that way.
It can be hard when life takes a downward turn.  It is fine to be nostalgic for easier times in the past, but you shouldn't dwell on it.  Concentrate on ways that you can improve your situation tomorrow, instead of pining for yesterday.