I know it's only Thursday, but I thought I'd share my plans and give you some ideas in case you're plan free at this point:
The Smithsonian Institute is having a Museum Day on this Saturday. Go to their website HERE, look at the list of participating museums (there's A LOT), and print a ticket for you and friend.
I love museums and have been itching to go to one recently so I plan on using my free ticket at the Harvard Museum of Art. Then maybe do some shopping in Boston.
Hope this gives you some inspiration for your weekend!