The first part : I have no idea.
The second part in italics/ blue: Your eyes glow/ brighten up as when the sun rises every morning
The last part : You should be an expert on this by now, Steeven's girl friend .
I get the first bit it is SMS-speak. ie g t = j'étais. J'étais peu-être saoul et j'étais peut-être sous ton charme..."
Steeven's girlfriend that means "Maybe I was drunk and maybe I was under your spell..."
Edit: oh yes beri said it already but I thought he meant he was tipsy and under your spell. Maybe I'm tipsy too.