considering that it's only this money, it's time-consuming and laborious not to go through legal procedures first.
communicate for the last time, clearly tell him your current financial difficulties and the importance of this money to you, and ask him to pay back the money as soon as possible. You can set a shorter period for him, such as three days or a week, and be firm.
and clearly tell him that if he still doesn't return it, you will take this matter to the local life group and friends circle, which is a familiar circle anyway. For example, the content can be written like this (so-and-so boss owes me more than 1,211 yuan for gas, and has been dragging it on, and it is also helpless to expose it here. I hope everyone can give advice or suggestions) so that the boss can realize the seriousness of the exposure and force him to pay back the money voluntarily.