Am I wrong for being really mad???

So here’s the story.. I woke up and my boyfriend wasn’t there and neither was my phone , he normally is and so is my phone.. anyway I went through to the bathroom and went in as the door was open.. my boyfriend quickly jumped up as I said the door was open so didn’t expect him to be in there.. I asked him do you know where my phone is he said yeah it’s through on charge, I said umm no its not.. then all of a sudden it falls and he grabs it I said can I please have my phone he said no.. I was like wtf give me my phone now so I grabbed it out of his hand.. he was watching porn, and sending nudes to various girls on my phone!!! He made a snapchat to do this behind my back!! I was mad at the fact he used my phone to do his dirty business all because his phone was out of charge and to top it off he got semen all over my parents bathroom as we were there for the weekend I was so furious and just got up and left and haven’t spoken to him since.. I’m staying at a friends house and I feel like I’m in the wrong?? Any help ladies and gents ☹️

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