Is it permissible for a suitor to speak kindly with his fiancée over the phone without exaggeration? Is it permissible for him not to contact her or ask about her for a long period? Is it permissible for him to hurt her feelings? Is it permissible for him not to visit her family or inquire about them due to existing problems?

The suitor is a stranger to his fiancée, and it is not permissible for him to speak with her except out of necessity. As for the fiancée's family, your connection to them is solely based on the engagement promise. There is no harm in not communicating with them, unless there is a kinship tie. However, communication is better for the preservation of affection.