Boyfriend laughs when we fight

I don’t know what else to do y’all. I love this man and we live together but anytime we fight he just laughs. I will be in tears because The fight is terrible and I’m so hurt and he will just sit there and laugh. When I tell him it’s not funny he just laughs and says I know it’s not funny but he doesn’t stop laughing. It drives me insane and makes me feel like he doesn’t respect me.