You should make sure you do not add anything to the truth. You may think it makes you look special to stretch the truth a bit, but it only makes you look bad. Telling tall tales or lies to others, even in fun, could make your friends not trust you or believe you even when you are telling the truth. God doesn't want us to lie to ourselves either. That is why He gave us the Bible as our guide book.
Lies come in many forms.
There is the tiny lie that we think will not hurt. We must be careful when telling tales. Stretching the truth is also a lie in God's eyes. Blessed are those who suffer for doing what is right. The kingdom of heaven belongs to them.