According to Article 188 of the General Principles of Civil Law of People's Republic of China (PRC) and the provisions of national laws, the limitation of action for requesting protection of civil rights from the people's court is three years. Where there are other provisions in the law, those provisions shall prevail. The limitation period of action shall be counted from the date when the creditor knows or should know that the right is damaged and the debtor knows it. Where there are other provisions in the law, those provisions shall prevail. However, if more than 20 years have passed since the right was damaged, the people's court will not protect it; Under special circumstances, the people's court may decide to extend the time limit upon the application of the obligee.

In your case, it is a civil lawsuit, valid for three years.

If you want to sue your friend, you must first know your friend's identity, whether he is a victim or a participant. And the prosecution needs evidence, such as the transfer records between you and your friends, and the communication records between you.