What does it mean when your heart starts beating fast around a guy?

When your heart starts beating fast around a guy, it can indicate feelings of attraction, excitement, or nervousness. This physiological response is often linked to the release of adrenaline and other hormones, which prepare your body for a heightened emotional state. It may also signify an increase in anxiety or anticipation about the interaction. Overall, it's a common response to being around someone you find appealing or intriguing.