I guess you'll know from the static in the air, from the singing in your heart, and when the birds start to sing.
When you wake you in the middle of the night just to check your phone, when you cant sleep because you're too happy. when days blur together to become weeks,and you dont even know how many days have passed.
I guess thats when you know theres something really special and wonderful there. And you'll never give it up for anything.