[slickpoppa]

First of all, so you don't get made fun of in the future by the dorks on this board: If you bet on the flop, and then someone puts down more money than you, it's called a "raise." An example of a reraise would be if you put down 2, he raise by putting in 4, and then you reraise by putting in another 4 for a total of 6.
As for your question, judging by his check on the turn after you, you were probably justified in calling the river.