I respect your drive, your determination. Your amazing ability to identify what you want and go get it. Sometimes I wish I were more motivated myself. But for Pete's sake (and the sake of those around you), lighten up a little. Relax.
Life isn't about career or reaching goals. It's the journey along the way... go to a party, spend more time with friends. You don't need to work non-stop... it's ok to take a break.