<human>: Can you provide a brief overview of the text?

My boyfriend was studying abroad for a year in UK, we decide to wait each other so basically we had a long distance 

Just weeks before he came back, he went on a short trip to the city and told me he "casually" meet a girl friend there, he even take a photo with here and upload it on snapchat, I was fine with that.

Eventually he came back, everything was fine, but I made a mistake snooping his phone one night and found texts with this girl (the same he casually meet), the text were flirty, like she sended a photo and he replied with oh you look pretty, beautiful.. And she calling him cute, and he telling her my heart.. 

In conclusion... Cute flirty texts.. The same way he talk to me, his girlfriend for 3 Years..

I confronted him, and he said he was sorry, he didnt like her the way I was thinking, for him she is only a friend, blah blah.. And in those texts I read, the "casual" meeting was not casual at all, they made plans to go to the city, he told me he lied to me because he knew I wouldnt be ok with that.

I talked with the girl, and she was all sorry, I missunderstand everything, she is not like that, she knew about me, and how crazy about me he is..

But theres this thing, I cant get over it, everyday That pop in my head, he talking like that to her, he lying me..

He also made the same mistake with other girl 2 years ago, i saw some cute innocent but flirty texts, I confronted him and he stopped..

**What I should do?
<bot>: boyfriend sended cute flirty text to a friend, he is deeply sorry as well his friend, I cant get over because I see that as a Betrayal.