How can one eliminate repeated involvement in unlawful relationships and the meetings and private encounters that follow, after numerous unsuccessful attempts to abandon this sin?

Satan leads to temptation step by step, and he might lead to fornication—Allah forbid. To get rid of this, one must: be sincere in the repentance and cut off communication with the young man, turn to Allah with humble supplication, remember death, a bad end, and the reckoning, be keen to accompany righteous women and attend gatherings of knowledge and remembrance, and hasten to marry a righteous man; for deeds are judged by their conclusions.