1. Boys may chat with girls they don't like, especially for politeness, work needs, social occasions, or to maintain a seemingly friendly relationship.
However, boys usually do not engage in in-depth private conversations with uninterested girls for long or frequent periods unless they are trying to establish a more friendly relationship or for other special reasons.
3. Boys may have a relatively cold attitude towards chatting with girls they don't like, with short replies and a reluctance to share personal life or engage in deep emotional communication. But this is not absolute, it also depends on an individual's personality and specific circumstances.