Is t okay for a man to go through a women's phone ?

I've always been willing to let him do anything on my phone (not the same with him) he went though my entire phone after I left it at his house. Then left him in my room went through my entire diary . & then went though my phone again. & then has the nerve to use everything he found (that was before we stared dating or even knew each other against me) is this right ??? 

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