Girlfriend told me she did coke.... reaction?

M'friend, you know as well as I that there is little you can do about addiction. If she still does it 'occasionally' (whatever that means) your imagination has already told you what I know from experience. I would especially be upset over her method of denial, ie, it's no big thing, "get over it." Her mean reaction speaks volumes to her dependency. I better shut up, you have all the information - believe me however, there's a great life after her. Greater than you can think! Meanwhile, I'm sorry you had to realize so overtly. Bear it, brother - and be strong!