The boss's words are ugly, but the truth is right. You don't know anything about him, so you took the liberty of lending him money. You can only say that you have too little life experience, so you can't be harmful, but you can't defend yourself. Just buy a lesson and don't be fooled in the future. If you have more money, you can ask the boss if that person's ID card is recorded. Generally, newcomers work in the boss's office, and the boss will register the employee's ID card. If you take him to the ID number, you can report it to the local police station, and you should be able to recover the money.