Well, they lied about a minor thing. Something that wouldn't even bother me if they told me outright. 

It's not what they lied about but that I know they lied and that I actually have proof of them lying. 

I only stumbled upon it by accident and gave them a chance to tell me about the truth but they straight out lied. 

I don't want to confront them since they'd believe they'd been right to lie about it. 

I'm just sad I'm being lied to... 

I knew that they aren't the most honest person before and I kinda felt special because they'd been so very honest with me (I know all the shit they'd lied about to former partners and other people and shit, I actually knew everything until recently). 

I have seen them in so many situations and I can read their face like a children's book but now I don't know what's true anymore.

Was it the first lie? Have they've been lying to me all along? 

They're actually not my fp, just to make that clear. It's no fp-obsession shit right now.