What am I facing after being charged with something that I am not really involved?

I was in a vehicle when the driver got stopped for speeding, then got searched without a warrant or a dog present. They found 1 gram of marijuana and a very small pipe. I was charged with possession and paraphernalia, so did the driver, even though it was clearly not mine and I had nothing to do with it. I am very concerned because I am only 18 years old , I am a security officer and I am joining the Marine Corps, this will seriously ruin my life ambitions. This is my first time ever getting into any sort of trouble and I would like to know if there is any possible way of getting this completely thrown off the table without going through the process of expunge.