Is there a way to help a fiancé who is suffering from lethargy, fatigue, strange behaviors, and feels the presence of another person with him, and whose exhaustion increases with ruqyah (Islamic exorcism), other than using water over which Quranic verses have been recited and supplication?

Ruqyah (definition) (Islamic exorcism) and supplication are two great means of healing from all illnesses, and one should persist in them. The symptoms mentioned may indicate sihr (magic), ayn (evil eye), or mass (jinn possession), but they are not conclusive. Symptoms of illnesses can be similar, and they might also be psychological delusions leading to exhaustion. Therefore, it is important to consult specialized doctors, as they may prescribe medications to calm the mind and strengthen the body.