Advice for a vey special relationship?

I recently went on a trip to see a friend I've had since the 5th grade to visit and see where she goes to school. It's a pretty long drive(4hrs), and was definitely a much longer drive than I would normally go on for most anything. As for the trip, we talked about our feelings towards each other. Both of us seem to have reciprocating feelings, which is awesome(I've been waiting for this for awhile). I said I thought it would be best to wait until she gets back in 9months or so. Anyone got any advice, tips, etc? This girl I consider to be marriage material.