Such an experience with this kind of human, I once house and feed one for 2 years while in school. I understand what you went through, sorry about that experience.

But one thing is always sure, something must happen before we can learn a lesson.

I don't even keep friends that are my age grade, I have just one person as my friend for the past 10 years, aside that, humans are not to be trusted.

Wishing you success 👍