Is it incumbent upon the suitor to return to his fiancée after her mother had previously expressed disapproval then returned wanting him, given that the girl's mother and brother now reject him after they had loved him, and is what he feels regarding the change in feelings of those close to him towards him evidence of him being afflicted by magic?

The reason for the change in the girl's family and their dislike for the questioner is unknown, and whether it is magic or something else. However, among the most important reasons for treating what afflicts a person are reliance on Allah, adherence to the prescribed supplications (adhkar) and legitimate incantations (ruqya), and prayer with a good opinion of Allah. There is no harm in consulting trustworthy healers who use legitimate methods. If a servant feels a lack of success, he should blame himself and repent to Allah, for affliction does not descend except due to a sin and is not removed except through repentance. Disobedience also has negative effects such as weakness in the body, decrease in provision, and people's dislike, while obedience brings light to the face, نور to the heart, and abundance in provision.