Fighting 👫

Well I have been with my boyfriend for about a year and a half now and for some reason we fight. A lot. We are both seniors now but during junior year we didn't really fight unless school gets difficult but this summer we will fight once a day or not fight for a couple weeks.  Some of the reason we fight is because I'm bipolar. We fighting about almost everything. Or we fight just to fight. Any advice for me to fix the fighting or to at least make him understand why we fight. Or just Advice to make it a better relationship? Anything helps 👌🏼