<human>: Can you provide a brief rundown of the text in within 3 sentences?

My (23M) gf (23) has told me from when we first met 9 months ago that she has an addictive personality. About 5 months ago she did cocaine for the first time and found that she liked it a lot. About a month or so after that she told me that she was just then 'finally' starting to lose cravings for it. About 2 months ago she did it again and this time it seemed to be laced with something because her and the people she did it with had some exaggerated reactions and she had an overall bad experience with it. On Halloween she did some again and found that her jittery, uneasy behavior while doing it wasn't anything she liked and told me that she was glad that she had that experience because it confirmed for her some things she had possibly "been in denial about" and she said she wouldn't be doing it again. Not wanting to put too much pressure on her I told her she should take a couple months off from it at least and if a situation arised again after that where she had the opportunity to do it, to consider it then. Last night she went out with her friends and told me she was up all night drinking and doing coke and she "didn't know why."

I'm very concerned and I want to be able to help her as best as possible but I'm not really sure what to say, do, or how to approach it. Any help on the matter from people who've been in similar situations would be much appreciated.
<bot>: gf has an addictive personality, has shown cravings and concerning usage of cocaine, need advice on how to talk to her.