What are some fun, free or almost free things to do in the Boston area?

My boyfriend and I are beyond broke, sick of TV and videogames, and NEED TO GET OUT OF THE APARTMENT AND DO SOMETHING FUN OR WE'RE GOING TO KILL EACH OTHER. What should we do?

Not much for free, but you can walk Boston. Try the Freedom trail that is free to walk, but may cost you to visit some of the sites on the trail.

Ya I forgot the Library does free passes. The only time you can not get free passes to the Aquirum though is in the Summer, they don't accept them then.

Ice skating is usually cheap
Check your library for free passes to the local museums