I had much the same problem. I had to seperate my training into a lesson every 3-4 weeks and this is torture when that hour a month that you fly is the best thing that happens in all of that month. The worst bit for me was getting out of that old smelly damp plane, and thinking that I wouldnt be back in it again for so long.
This made it very difficult to concentrate on the ground exams. But i got through them, we all do.
I don't now if your into the trend yet of hanging around the flying club whenever you get the chance. I now it may sound strange, but being somewhere with like minded people, who you won't bore by talking aeroplanes, will make you feel much better. One of the community so to speak.
All the best with your training.
Jon