You can't do that for someone. It's something they have to come by themselves.

Validating her situations can help her but making her dependent on your care & taking her meds right does nothing but make them dependent on you.

Getting her to take responsibility & encourage her when she is doing a good job can help....others here may have some other good suggestions but in reality it is something she has to realize on her own & many people who are encouraging environments still have a lack of self-worth due to their past experiences & unless they do hard work to change their thinking it doesn't happen.