What is the way to get rid of the habit of harassing girls and talking to them, especially after committing to prayer, knowing the error of this action?

Speech with women, in principle, should only be for a specific purpose; otherwise, it would be among the steps of Satan leading to indecencies. It has been said: "A glance, then a smile, then a conversation, then a greeting, then an appointment, then a meeting." As for harassing girls, please refer to fatwas number: 30379 and number: 36243.