<human>: It's quite a complicated situation we are in. The girl and I started dating around September last year, but she was still living with her ex. They had been broken up for a good five-six months, and had not been sexual in all this time.

He refuses to get over her, and she doesnt want to hurt him - so everything's been kind off at a standstill. We've carried on dating all this time and he knows we see each other, but she has never been able to get serious with me because of not wanting to hurt him.  I've always said Im OK with the situation as long as she is 100% honest with me, all the time.

She has now booked a holiday with, what she told me, was a few of her girl friends only. I got a little suspicious today, and despite promising i wouldnt go through her phone, i did and read an email from her ex expressing how he cant wait to go away. Now, I know i was in the wrong with going through her phone, but something told me she wasn't being truthful and so I followed through with it - but i know she wont forgive me for invading her privacy like that, so I need a way to bring it up in a way that was innocent to have found the information out. 

I was wondering if anyone at /r/relationships would be able to offer some advice?

Can you give me a shortened version of the text?
<bot>: I looked through her phone, found she was going on holiday with her ex and lied to me about it - i need a way to bring it up without letting her know i went through her phone.