<human>: Can you condense the text into three sentences or less?

I have been having internal issues with my boyfriend - things I've been trying to figure out for myself (you can see my other thread on this). When we first started dating, he lied to me about talking to some other woman at the same time, but finally came out with it when I accidentally saw a message pop up on his phone.  He's also lied to me about his finances because he was embarrassed about it.

He takes his phone everywhere with him, including the washroom. But he had given me his password and it was no big deal. My SO has a tendency of lying in the past, mostly when he feels he is being cornered, and exaggerating a lot. I chalked it up to his ADHD, because I felt he would never really do much damage. A lot of little "white" lies to get out of situations.

Today he left is phone at home to charge and took mine just in case anything came up.  He made such a fuss about leaving it to charge and made some excuse about needing to go into the bathroom - obviously he took it with him. He came out 10 minutes later and I was convinced he deleted anything he probably didn't want me to see.

After he left, curiosity got the best of me and I see now that he changed his password. 

Should I be worried? I mean, I've caught him lying to me a few times already - from big to small things. It just doesn't sit well with me that he's not transparent with me. I'm sure it's not another girl - he spends all his time with me and he's crazy about me. But, you never know... He has always been protective over his phone, particularly after that one time I caught him in a lie about a girl very early on in our relationship.
<bot>: BF changed his password on his phone so I couldn't access it while he left it with me. Should I be worried?