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2 weeks until d-day! I feel like I bombed my interview but am still so antsy to get a definite answer. I can't stop thinking about it!
Give it some positive thoughts. That would help. And it's difficult to say how an interview has actually gone. You smiled a lot, the interviewer smiled too. He asked a lot of questions, you gave a lot of answers. He was very genial, you were charming. But did you answer his questions? Or were you just concentrating on selling yourself? If it's the former, you might think you've had a so-so interview because you'd think that you could not get into the details, or able to tell him all you wanted to. If the latter than you'd come home gushing.
Interestingly, in my view, the former might just be the good interview. An interviewer will only ask those questions to which he wants answers. And nothing more is required. Once he has obtained his answers, he'll file the report. I think the Adcom will get a rather dry account of the interview anyways - Questions and Answers. Were you to the point? That's good. Did you wander off? That's not.
So don't dwell too much over the interview. Like the GMAT, if you think it went bad, it probably didn't

Good luck.