Can a friend's repayment text message be used as evidence?

It's hard to prove, because if he wants to break the contract, he can say that he didn't send it at all, so he needs other evidence to prove the other party, such as the way you lent him money after sending and receiving text messages, such as bank records or witnesses. I feel that if your friend doesn't have a big financial problem, you can discuss it with him and pay back the money later, but I will write you a note. If you can't pull this face down or the money is not too big, forget it!