Nope, the worst thing you can do is confront little lies, just be vigilant.
For some reason himself does this all the time.
"i'm leaving now" - and he's not even outta bed.
Setting: me waiting outside closed store for lift home
me: where are you
him: about 2 mins away
me: but where are you
him: errr by fords (factory just down road from store that makes car parts)
me: ok
10 mins later he will arrive to pick me up cuz he hadn't left yet.
When I catch him fibbing he gets sulky and whingy. I ask him why he does it but he says he doesn't know.
So now when I catch him out I tell him there is no discussion I know he's fibbed to me and that it makes me feel bad like he doesn't respect me.
He sulks for a while it all gets forgotten. Thing is know that I can actually trust him, its only stupid stuff he lies about, I figure its just a guy thing.