That's when you know.

You know you have the right person when everything they say, no matter how stupid, can make you smile.
When your heart skips a beat everytime you look into their eyes.
When your left completely breathless after they flash you a smile, and speechless, even though you have so much to say.
Your body trembles at even the mere thought of their name.
When days come and go, yet your love for them never fades.
Your jaw drops every time they walk into a room.
The thing your scared of most is, not the fact that they may not love you back, but the thought of not having them in your life at all.
The thought that in one moment, everything that mattered to you just disappears.
That's when you know your heart has been stolen, that's when you know your in love.