you should get atleast 140g of protein at your weight, optimal would be around 220 i'd say, but that's pretty hard especially for someone in HS. Tuna, milk and chicken breast are all good, milk has around 32g of protein per litre, tuna has about 27g in a 170g can, and chicken breast about 40g of protein for 1 skinless breast. So if you eat one of those per day you already have 99g of protein +your protein shake = 140g of protein, not hard at all to get 1g per bodyweight. And you could double that with a little effort i'm sure. Egg whites are also good, don't eat to many yokes though. To be honest i can't really see any change in your muscle mass though that may be due to lighting. I would also suggest creatine and drinking 2gallons of water every day but again this could be difficult for someone in highschool.
What does your typical workout look like? I would suggest a 3 day split, something like monday:triceps/chest, wednesday:legs/shoulders, and friday back/biceps. Like Workerouter said do the big3 - squats, bench, and deadlift, one for each day at the gym. Add a couple more compound movements in after that and then finsh off with a couple isolation exercises, I like to do BBcurls for biceps, DB flys for chest, and leg extensions for quads.
People say that teenage girls prefer skinny/toned guys but I personally don't believe thats true, as long as you aren't fat, the more muscle the better...unless you end up looking like ronnie coleman. goodluck
ps if you haven't already gone to
www.bodybuilding.com go now, it's a great site for begginers, go there and read all the stickies in the teen and workout program sections of their forum.