Stop complaining about playing against older kids. Repeat after me. Son, hit the wall for 30-60 min per day, Shoot for 45 min every day no matter what position you play except keeper. Speed, agility, explosiveness and endurance training 3-4 days per week. Intensive weight training 3-4 days per week. At least a 3.5 GPA in a well respected college preparatory track which means 3 hours of homework per night minimum, 1300 and up on your SAT which means 1-2 hours of SAT prep 6 days a week. Individual lessons with a position coach 2-3 days per week out of season. Join the most competitive club you can and get pushed in practice and in games. Don't play down, play up, Lastly, if you're one of those gifted athletes, play and excel at one or two other high school sports. I've seen all american lacrosse players play all types of complimentary sports: football, soccer and cross country in the Fall and basketball, wrestling and water polo in the Winter. Its about the will to work and to compete and excel.