<human>: We haven't really ever had a fight until yesterday when I saw her upset and asked what was wrong she told me she went through my phone. It has a passcode on it so I guess she secretly would watch me unlock it as well.

Our relationship has been very good I try to spoil her when I can. I am not perfect and am known to flirt with girls but she knows this is my personality type. She was mad because one of my exes sent me a pic of her in bra and panties and I sent her back a pic of me progress in the gym shirtless.(I've been completely 110% over this girl for years no feelings whatsoever) She was also mad because I was flirting with another girl who I guess she didn't realize was a lesbian. 

She is an awesome girl has really great character but her going through my phone secretly really pissed me off so I told her to get out and haven't talked with her since. I realize that my flirting is very silly. I would never cheat on her. I just do it for fun. 
Am I a total douche? I'm not the jealous type and I trust her so I wouldn't really mind if she was flirting with other people. I would never check her phone because I think its childish and I trust her.
Any advice is much appreciated.

Can you condense the text into a few key points?
<bot>: GF went through my phone secretly, saw me flirting with other girls via text. I got pissed she went through my phone and told her to get out.