Hey Adam. Lacrosse seems awesome, and I understand wanting to stay on the team. By bulk up, did he mean get stronger, or bigger?
Is your goal essentially to gain mass, or to build muscle? Possibly both?
No prob bro. Never got to try lacrosse, always seemed cooler to me than football.
So what you're going to want to do to build muscle is a combination of eating the right foods and/or supplements and weightlifting.
For running, I suggest lot's of cardio work. (Running is hell on me too) Set a distance or amount of time you want to run each day, and steadily increase it as time passes. This will greatly help you raise your endurance although it'll be a pain in the ass at first.
If you're wondering what to eat, focus on foods high in protein (such as fish, beans, eggs, dairy, lean meats etc.) Which sort of goes without saying. You can't build muscle or mass unless your calorie intake is higher than your output. If you don't have access to a weight room, look into a gym membership, because the quickest and most efficient way to build muscle is through lifting weights.
Any other questions?
A gym is usually the best way to go, but you can still get around that if you just work to your goal. And with the supplements, I've never used them personally but I'm pretty sure most bodybuilders do, so I guess you could decide after researching that a bit.