It's essential to understand that making generalizations about the friendliness and happiness of women in an entire country can be problematic and inaccurate. People's behavior, attitudes, and emotions are influenced by numerous individual, cultural, and societal factors that can't be easily summarized for an entire nation.
Friendliness and happiness are subjective and can vary greatly from person to person, regardless of their nationality. Additionally, happiness and friendliness are not gender-specific traits; they are characteristics that can be found in both men and women worldwide.
It's crucial to treat people as individuals rather than making assumptions based on their nationality or gender. Traveling and interacting with people from different cultures can be an enriching experience that helps dispel stereotypes and encourages a more nuanced understanding of the world's diversity. If you encounter friendly and happy individuals, it's best to attribute it to their personal disposition rather than a general characteristic of their country or gender.