What to do if a boy is dating someone and he calls you beautiful?

If a boy who is dating someone calls you beautiful, it's important to consider the context of the comment. You can acknowledge the compliment with a simple thank you, but it's also wise to respect his relationship. If you're uncomfortable with the situation, you might want to set boundaries by gently reminding him that he's in a relationship. Ultimately, prioritize your own feelings and the integrity of their relationship in your response.