If you look at her pattern of behavior and take into account the mental health issues she had, you will know that it can cause extreme emotions in an instant, and often times impulsive reactions to those emotions. I think she struggled with it to a crippling degree, used drugs to mask/help it, and just couldn't take it anymore. She was barely 20 years old and possibly knew she didn't want to deal with this for several more decades. You can tell she had attempted to get help but nothing was working. Sad as F tbh. This girl will never experience getting married and having a family of her own. And to be fair... a lot of people won't with how worse everything is getting in this world.