Date Ideas that are free or cheap

So one of my biggest fears in a relationship is the guy getting bored or even me getting bored. I was wondering if you guys have any unique, fun date ideas? One idea I had was Painting With a Twist, but if I pay for me and my bf, it would be 70.00!!! I'm a broke college student, I'd rather spend that on groceries!! Plus my bf has been pretty occupied as well as tired and will be done with vacation in a two days, so it would be great to just relax and have fun at the same time, just us. All ideas are appreciated, thanks!