In the United States, you is used to refer to individuals in the second person plural. It has historically been used only in the dative case, but is now used in all cases and numbers. While you is a common choice for the second person plural, it should be noted that youse is also an acceptable alternative to you.
Gendered language is especially problematic for trans and nonbinary people. However, young speakers and politically progressive individuals tend to avoid using such language. It’s best to try and avoid using gendered language whenever possible. This will help you make a more positive impression on others. In addition, you’ll avoid making mistakes that may cause others to misunderstand you.
In the Middle Ages, you and ye had a similar function. They were used to indicate an intimate relationship, but sometimes were used to show deliberate disrespect. Eventually, the use of thou was dropped from formal writing and you became the standard subject pronoun. However, you for the singular continued in informal usage well into the 18th century.
Another way to ask “what are you doing” is “what are you up to?” This question can be interpreted in several ways: it could mean what you’re doing today, what you’re planning to do later in the day, or what you’ve been doing for the last few days. As a result, it’s a great way to get to know a person’s interests and personality.