Advice?

Me and my boyfriend have been together for three years. Our families love each other his family loves me and I love them and I love my boyfriend so much. I really do. But yesterday and all day of today we’ve been fighting. Whenever we argue we argue long and hard. And it always makes me so stressed out. It makes my heart beat fast and my stomach twist up into a knot. I always cry and it’s just very fusterated for the both of us. I’ve considered breaking up a couple of times (that’s how bad our fights are) but never no disrespect ofc. Whenever I think of breaking up I think of our families and all the good moments we shared and I can never actually bring myself to it. Am I overreacting? I love him and he loves me but I just don’t know.