Xander,
Yup, if I had to go to school with my younger self, I'd punch me right in the face a few times.
It's a well-known law of the universe and bad sci-fi movies that you cannot touch yourself when time-travelling. You'd both be obliterated! I'll make a deal with you, I'll go beat some sense into your past self if you'll go beat some sense into mine.
Hmmm