This is what girls do, everyone should know this. I think it was a bit of a shithouse move to go snooping through her personal accounts though. You should've trusted your own instincts when your alarm bells went off and made your decision then rather than getting into her Facebook and emails. You've now chosen to write about it on here and said you're furious and hurt, so now you're going to make irrational calls when prior to knowing everything through hacking her stuff, you would've been much more level headed and able to work things in your favour.
Imagine you cutting ties with her now, her asking why, etc. You'll probably let it slip why you're actually pissed off with her whereas before finding out, you could have made more cool, calculated decisions to really fuck with her hamster.
When the alarm bells go off, you should be thinking that this girl is up to something and you can't trust her, so where's the next one? Not what you did.
Imagine you cutting ties with her now, her asking why, etc. You'll probably let it slip why you're actually pissed off with her whereas before finding out, you could have made more cool, calculated decisions to really fuck with her hamster.
When the alarm bells go off, you should be thinking that this girl is up to something and you can't trust her, so where's the next one? Not what you did.