My so left his instagram up and I found..

I found pics of him at a strip club (so what) and I went to the pics he liked half naked women pics and hundreds of women flirting. now this may sound like I'm 17 or something but I'm so furious and angry. am I childish for wanting to leave his sorry ass? he never compliments me at all, but gets on social media and show all women half dressed or naked love? What would you do? I just feel he's so sneaky. btw I'm 21 years old