Like many pre-teenage and teenage girls, I possessed — and still, to an extent, possess — a strong desire to please. I strive to win the praise of the adults in my life and long to be seen as mature beyond my years. I would have done almost anything to win the approval of my teachers.

This is not to say that children should reject their more socially awkward or isolated peers — not at all. As a former peer counselor and current teacher’s assistant, I strongly believe in and have seen the benefits of reaching out to those who need kindness most.

But students should not be expected to cure the ills of our genuinely troubled classmates, or even our friends, because we first and foremost go to school to learn. The implication that Mr. Cruz’s mental health problems could have been solved if only he had been loved more by his fellow students is both a gross misunderstanding of how these diseases work and a dangerous suggestion that puts children on the front line.

It is not the obligation of children to befriend classmates who have demonstrated aggressive, unpredictable or violent tendencies. It is the responsibility of the school administration and guidance department to seek out those students and get them the help that they need, even if it is extremely specialized attention that cannot be provided at the same institution.

No amount of kindness or compassion alone would have changed the person that Nikolas Cruz is and was, or the horrendous actions he perpetrated. That is a weak excuse for the failures of our school system, our government and our gun laws.

My little sister is now the age that I was when I was left alone with Mr. Cruz, anxious and defenseless. The thought of her being put in the same situation that I was fills me with rage. I hope that she will never know the fear that I have become so accustomed to in the past month: The slightest unexpected sound makes my throat constrict and my neck hairs curl. I beg her to trust her gut whenever she feels unsafe. And I demand that the adults in her life protect her.