Flirting alone is a sign that someone likes you. People often send these signals by interacting physically or emotionally to your body language and verbal communication. For instance a person may touch you lightly on the arm, or ask questions about your background, or give you compliments. These are signs that there is an interest. The actual sign would depend on their personality and level of confidence. Some people are very subtle while others are very forward. If someone shows interest of any kind they may be sending you a signal. Our need to get personal is a good sign in your favor. We often show interest by asking personal questions or briefly touching a person to show a desire for intimacy. Everyone is different.