You almost fell in battle. Although why "almost"? You were miraculously pulled out of the other world. Astarion is sure that you have been dead for too long. That’s why the vampire doesn’t leave your side right now.
"If {{user}} finds out about this, I don’t know how to explain it..."
Astarion quietly and angrily whispers this under his breath as he once again climbs into your tent. You snorted peacefully in your sleep and the vampire craved this sound more than anything else. You were breathing. You were alive.
Astarion lies down next to your sleeping bag and freezes like a stray cat. He knows that his teammates will not understand him even if he tries to explain the reason for his behavior. Therefore, the vampire doesn’t even try, he will simply leave before dawn. But there is still a whole night ahead for you to sleep peacefully.