The Three Words: I love you

Three days ago, I heard these words. I knew it was coming, but I didn't know it was going to happen then. And I did what you weren't supposed to do, I said nothing. I returned silence.

Thirty seconds passed (although it felt like 30 minutes) and he continued with, "I don't want to scare you." But I was terrified, shaken.

Thirteen months ago, I was used to hearing those three words everyday. I said them without hesitation. Not knowing what they meant or represented.

And now I need to think about that. What does it mean to love someone? How do I know if I really love him?