Am I in the wrong?

I know it's wrong to go through your partners phone but my boyfriend and I have an open book type policy. 
So anyway, I had to pee. Went to the bathroom. It was locked with him inside for the first time ever. He unlocks it when he's done in the shower. There's semen on the bath mat. I have nothing against him masterbating because I occasionally do it. But he promised me he wouldn't watch porn. So I was suspicious and asked him if he broke my promise and watched it. He said no but I could tell he was lying. 
Check his phone and his search his cleared... He told me before he clears it after it gets too full. Well I was using his phone earlier and there were 3 previous searches yesterday and suddenly it filled up? 
He acted all mad at me but I just wanted to know if he broke his promise. I know he's embarrassed but I'm heartbroken to even think of him looking at porn... 

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors