I have been enabling my daughter financially and emotionally. I feel trapped and want to build a healthier relationship with her, but she is very needy. How can I change things?

If she is a struggling alcoholic the an AA chapter near you can help her cope. Take her to a couple of meetings and see for yourself.

You can't change anything. She has to want to change in a very serious way. If you have the finances, you could try to get her to enter a treatment facility but if she really wants to change, AA as tickle recommended can be very effective and the help she is going to need for the rest of her life is more easily available through AA. Good luck.