Is it permissible for a girl to become attached to a man and pray to God to grant him to her, while lowering her gaze and not informing him of this, and is what she encounters of similar talk considered a warning from God or merely a coincidence?

The ruling on a man's love for a woman and vice-versa has been clarified in previous fatwas. The questioner has done well in general supplication and entrusting the matter to Allah. As for what she heard, that she is living in an illusion, no ruling is based on it, as it could be from Allah, or from Satan, or from what the soul whispers. Since there is no sound evidence, it is not relied upon. One must supplicate to Allah to ordain what is good.