I liked that about Pete's character too, but then he brags about what Clark did to Lois. So much for friendship.
Did we hear what he actually said? Because Lois had already made it to Smallville by then, and may well have already known that it was Clark and told him so (several other kids on the bus saw him, too, and that wasn't the first incident). Or it could be he was just happy someone believed him when he told the story. I don't know. Maybe he is just thoughtless, like you said.
Clark responds (basically), "Oh, that's only applicable when both are human."
What gets me (IIRC) is that he said "if the other person is human" and Lois
is human so by that logic it would be all downhill for Clark after the first kiss. The line just sounded weird to me.
BTW, has anyone read the novelization? Is it any good? Not even an except on Amazon so I can't even judge the writing style. I'm not big on novelizations that depart drastically from or change the flavor of the source material, but I like extra character insight.