Rage and despair filled him, and he sprang out on the sand to help his friend or die with him, and ran towards that small fading glimmer of light in the empty dusk of the dry land. (10.67)
Well, maybe this is the best proof that Vetch is best friends with Ged. And this isn't the first time that Vetch ran toward danger rather than away from it. (Check out 4.54, when Ged is attacked by the shadow monster: "Vetch alone ran forward to his friend.") We may not have to ask our friends to face life-and-death situations like this, but it's sure nice to know that they're there for you if you ever have to.