I feel I've read about this before, and that your gf's recklessness has been going on for some time now.

In your own words it sounds as if your gf is not responsible for her behavior. But only she can be responsible for her body, her mind, her integrity, her health and wellness. Think of saying to yourself, this is the behavior she chooses. I love her, but may need more distance while she is making these choices.

Where does that get you, when you reframe your thoughts in a way that allows her to own her choices (and you to own yours)?