Hey Levi,
There's plenty you can do. I had lived there for many months as well. I highly recommend checking out L.I.F.E volunteering. It's an amazing group and I even coordinated one of the places (Laferrere). If you end up actually volunteering there, let me know if you go to Laferrere. The people that are volunteering are mostly backpackers and expacts. With that you'll make a TON of new friends and likely always find something to do because of it. Also it's like having free spanish lessons. The kids will get you learning and an amazing way to practice.
http://www.lifeargentina.org/ is their site. Def check it out. PM me def if you go. Have such good memories there.
Next.. Check out Uruguay. It's a 30 min or 3 hr nice boat ride from BA to Colonia. Bring your drivers license and rent out those super mega tiny cars for a bit of a ride down the beach side. its beautiful.
GO TO BOMBA DE TIEMPO!! YOU'LL THANK ME LATER!!!!!
http://labombadetiempo.blogspot.com/