Tell him you already have three full-time jobs lined up and that you figure you can sleep when your dead, and as far as enjoying life goes, you can do that after you've worked 20 years and have a crazy wad of loot saved up. Then he'll get into a World War II story and you'll be home free. Read the article it'll make sense. The Girlfriend She's tough. I don't know about you, but any future talk beyond planning a date for next weekend gives me the creepy crawlers and the dire need to start running like Forrest Gump.
Extreme cases warrant extreme measures.
Tell her as you begin bouncing around and gasping for breathe that you have come up with a technique to give you insight into your future. Proceed to slip on a Moroccan Chaleba and kneel on the ground while raising your arms in the general pray position. Hopefully she'll think you are delusional and begin to believe that in your gut you really are without direction. The Parents May the Good Lord be with you on this one. Having raised you, your parents know you are about as motivated as a hibernating bear.