DP and I have been together for 4.5y, lived together 3.5y. Every so often I feel the need to address something (eg I have slipped into doing the lion’s share of cooking, or I feel he is making unfair comparisons between our kids). I do this reasonably, without drama, but he quickly gets defensive and shouty which makes me defensive and shouty - and then we say hurtful things. This hasn’t happened very often, but it upsets and frustrates me that we cannot communicate better. Any tips?