This song is obviously about God, and how she can feel His presence everywhere she is. I believe her "i'm alive" is telling of how she is alive due to Christ. This song was created before Twilight anyway, so it most definitely isn't about Twilight. And it most definitely isn't about a bf. The tongue dancing behind her lips is only a reference of how she wants to praise God. I felt the same way when I got saved. It's a wonderful feeling and having a relationship with God is the best thing you could ask for! I love this band, and I love Lacie, especially for her bravery. She's my inspiration!