Happened to me tons before.. Most of these people I just don't bother with.. Knowing that they lie.. I lie too
.. That was more in highschool, but had a few incidents here too. When I say I didn't do well, I actually mean it and that's how it should be. And if you don't want to tell me how you did, just say that you prefer to keep it to yourself, I've done that and there's nothing wrong with it.