What should I do if my ex-boyfriend borrows money and doesn't pay it back

Ex-boyfriends can take the following measures to borrow money: 1, ask directly, and it is best to show the ex-boyfriend the loan or proof; 2. Third party friends are involved. Ex-boyfriends and mutual friends can ask your mutual friends for help and help you express your willingness to pay back money. 3. Collect evidence to sue your ex-boyfriend, and collect favorable evidence, including IOUs, recordings of how much your ex-boyfriend personally admits to owing you, or third-party witnesses who witnessed you lending money to your ex-boyfriend. Article 65 of the Civil Procedure Law stipulates that the parties shall provide evidence for their claims in time. The people's court shall, according to the litigant's claim and the trial of the case, determine the evidence that the litigant should provide and its time limit. If it is really difficult for the parties to provide evidence within the time limit, they may apply to the people's court for an extension of the time limit, and the people's court shall extend the time limit appropriately according to the application of the parties. If a party fails to provide evidence within the time limit, the people's court shall order it to explain the reasons; If the people's court refuses to explain the reasons or the reasons cannot be established, it may reject the evidence according to different circumstances, or accept the evidence but admonish it and impose a fine.