Love at first sight is a complex physical event that takes seconds: 6 signs - voila! Sheee. If you're at a party or bar with friends and you spot someone mirroring your pace and style of movement as you chat, it's a sign that they're falling in love.
The best flirting signals are when they listen to you - combined with their eyes moving down to your lips and back to your eyes is a hint of interest in you. The "ignoring" ritual is a sign they are trying to bring attention back to them.