Social networks can be a very useful tool to connect with other people, but you can also find people who are not authentic.
It's good that you were able to find a friendship that benefited you a lot, helping you to quit your bad habit. I'm also sorry that he left like this.
As in face-to-face contacts, we must be cautious when placing our trust. And not let ourselves be dazzled by a fake or ill-intentioned shine.
{Success and until another time.
You are right, trust is not to be taken lightly.