Hi Kelly, I know many students are in a similar situation and it is extremely hard to do it all. I would definitely try to attend the graduate school functions. I think a huge part of graduate school is meeting a new, extremely educated, driven, diverse (the list goes on) network. I'm not sure of your age, but I recently read a book called, The Defining Decade - Why your twentysomethings matter, and there is a great chapter called The Power of Weak Ties. The whole book is amazing, but this chapter specifically focuses on why going to new events/ meetings are so important. Someone once gave me a piece of advice that even if you can attend for 20 - 30 minutes, you should GO. Set a goal for yourself before each event or meeting, so you can be productive in shorter amount of time - ex. I'll talk to three new people, then I'll let myself leave and feel really good about the event (can be less or more). I hope this helps. And good luck in your future endeavors!!