For HIV to occur, there has to be a fliud HIGH in HIV. This includes semen and pre-cum, vaginal fluids, blood and breast milk.
She is a virgin and so mbae inserting your penis into her vagina, you penetrated her and chances are you had pre cum. The fluid that baths the penis. If your pre cum had HIV, then it got into her.
You should both get tested for a clear mind and drunk or not, I hope you have learned your lesson.
Sex is not a joke anymore. It is bright to be aware of what is going on. You are still young and life is precious. Keep away from HIV/AIDS please. It infects you and affects loved ones.
Use condoms!
All the best
Muthoni (mson)