Husband betraying me...

I know this is a controversial subject so please dont comment about how I I shouldn't care blah blah blah. I've posted before about my husband watching porn and I am not ok with it. I've had the conversation with him and he swore up and down he wouldn't ever again. He was basically replacing me withporn. So I've had the feeling hes been more sneaky about it and sure enough he had me loook something up on Instagram for him and his recent searches popped up and sure enough hes trying to find porn on there (he doesnt know how Instagram works, so he thought that would work) and he just laughed about it like I was suddenly ok withit. So I'm not sure what to do at this point.