This must be very difficult for you and I can see that you care very much for your daughter and only want the best for her. She is an adult and with that comes the part about her being able to make her own decisions.

I don't know if you've heard of the concept of "detaching with love", but it makes a lot of sense. If you google this, you'll find a host of information about it. There's a pretty good article on the Huffington Post website that should pop up with a few tips. Some of the articles out there are related to chemical dependency, but the concept is still the same. I think there's even a book with the same title.

How does your daughter's decisions make you feel?

I think you need to find peace within yourself, even with your daughter's decisions. Even if they're bad decisions. Just let her know you'll always be there for her. You can't protect her from the world forever. Detaching is hard, but I think it would help you with this situation.