The Green Lights
1. Sustained eye contact (3+ seconds). 2. They angle their body toward you. 3. They find excuses to touch you (arm, shoulder, hand). 4. They laugh at your jokes — even the bad ones. 5. They ask you personal questions. 6. They tease you back. 7. They hold the conversation, not just respond.
The Yellow Lights
Short answers, looking around the room, closed body language (crossed arms, turned away), checking their phone. These don't mean "stop forever" but they mean "not right now."
The Red Lights
They move away. They say no directly. They stop responding. They call someone over. They put a physical barrier between you. Respect every single one of these immediately and without question.
The Most Reliable Signal
Reciprocation. If they ask you a question back, engage with your topic, or expand on what you said — they're interested. The conversation should feel like a ping-pong match, not a speech.