Sure that is frustrating, but education is important, the debt is cheap, and he'll graduate soon enough. Hang in there.
You certainly know this, but do take extra care not to let your frustration flow into your relationship. It sounds like both of you are working to do the right thing financially. Besides, tension in a relationship often eliminates every couple's favorite frugal activity.
Also, were you saying that a lack of frugal things to do is part of what's frustrating? There's sure a lot of lists on the PF blogs that could help you out on that front. Free/borrowed movies (or the 99 cent rentals at the local grocery store), outdoor activities (might require snowshoes where you're at, but you can find those cheap), cooking (with enough for tomorrow's lunch), playing guitar/whatever instrument are all things I've enjoyed with friends/past gf's.