JA, i know how you feel. Although you are in your second year and i in my third month, i am already beginning to feel the strain. I know that may sound impossible or it might be me just being ridiculous. My PhD is in industry and my supervisor is very hard to please. I too am stuck in the lab with no one to compare results with but they do similar work (in a way) so i can, at least have a chat when i hit pot holes.
It is natural to feel this way. I always try to remember the goal i have in sight, to keep me going. Talking to your supervisor will help, especially if they are very supportive.
All the best.