In theory an 8 is a pretty girl- gorgeous is 9 or above.
More than likely, you're probably average in the looks department. Girls especially always seem to give other girls high numbers like 7's, when in reality "average" should instead be a 5. Like, whenever my friends rate each other, they always give 7's or higher, NEVER below a 7 though. Below 7 basically means below average, aka unnattractive. I guess 7 just sounds better than a 5.
So, take these "ratings" with a very small grain of salt, because they probably aren't very accurate/ indicative of your actual level of attractiveness.