<human>: A few months ago we deleted our snapchats because I was following some models which she didnt like. 

We decided to download snapchat again months later and I again followed arsenic magazine which shows a lot of models and I thought it was ok because my gf is also a model. 

I screen shot a snap of a model to visit her website, my gf saw the screen shot moments ago and broke up with me for betraying her trust.

My defense is that its just pictures, I'm not masturbating to them, while she occasionally watches porn and masturbates to the videos claiming its different because she thinks of me while shes watching.

I have no problem with her watching porn or anything she wants but i dont know how to convey to her in a way she will believe me that im not masturbating to other girls or lying to her. 

She says i shouldnt have added arsenic or anything like that, but i thought she knew i had arsenic

Did i mess up?

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: gf broke up with me on a weekend cabin trip and has locked her self in our room. She says we are done because I have been looking at models on snapchat after I told her I wouldnt do that.