Boyfriend being an ass,

me and my boyfriend have been together for over a year and a half now, we went through a rough patch and now we’ve came out so strong and been better then ever the last few months. i’m so so happy with him... at least i thought. We was arguing which we haven’t done in a long time- he told me he struggles to keep me happy and i cause him stress because i’m never happy!!! but i am always happy with him, i really really like him and i want it to work out but after he said that it just plays in my mind. What do i do?