I'm pretty sure my friend is lying to me?

[pinkypanther]

I don't know if I should post specific examples or what. My friend typically lies about his friends and I know this because I can see proof that he lying through social media etc. I mean, what he is lying about isn't a big deal but I find it out and kind of a turn off. Now, I don't know what else he lies about. I'm really close to him and I don't know what to do if he is a compulsive liar. What should I do? I can't call him out on it because I sort of did some minor stalking to find out that he was lying lol. I'm a girl, I can't help it.