I am 5 foot 6, 120 pounds and 13 years old.What position should I play in football?

I am going to play on an 8th grade team, I currently play quarterback, and outside linebacker. I am really quick and have really good footwork. I can throw about 35-40 yards, and when I run I go into the defender and usually break some tackles. Should I stay at qb and olb, or should i change to a different position and practice it until football starts? I squat a 150 max (can do about 5 reps), and a 145 max bench (about 5 reps).