We're not exclusive, so why is he mad?

I've been seeing this guy for a few months. He said he wasn't ready for a label. We were at his house and we were using my phone to order food. He saw that I still had a dating app on my phone and got upset, not mad but kinda hurt.

I haven't messaged anyone on that app in months, he still has the same app on his phone but hasn't messaged anyone either. I let him look at it because I have nothing to hide and he did the same. I just can't wrap my head around him being upset about something and being "guilty" of the same thing. Especially since we aren't exclusive.

We're not exclusive, so why is he mad?
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