<human>: Can you condense the text into a few key points?

My boyfriend went behind my back into my cell phone and read various text messages and conversations. I have nothing to hide and I would openly tell him messages or convos I had with friends from time to time, but this is a huge invasion of my privacy and personal space. This is the second time I know of that he has done it. The first time almost caused us to break up and I made it clear how much my personal stuff and privacy is important to me. He swore he wouldn't do it again, I trusted and believed him, and 7-8 months later he did it again. Is this a normal thing for boyfriend/girlfriends to do? Am I out of line for ending the relationship over this?
<bot>: I ended a one year relationship with a guy I love and care about because he went through my texts and conversations behind my back. Am I over reacting?