It usually goes something like this:
"Hey, where were you this morning?"
Wide awake and far too anxious
to think about socializing.
"Oh", [sheepishly] "I was sleeping."

"Yeah, what are up this weekend?"
Thinking about you,
I really like you, sighs
[exasperated sigh] "I'm working,
Really busy at the moment"

"You coming?"
I'm just not able
for it right now, have
to give it a miss. [measured reply]
"Yeah, I might be around"

The thing about lying is you inevitably
do it without thinking, use it to cover
up what you are really thinking about.*

Of course you're only lying to yourself.