Cant stop being a brat to my loving bf . why am i doing this?

idk whats wrong with me lately ive been really depressed and i keep getting mad at my bf and keep trying to push his ons .. and start fights with him idont understand why he wants to b with me when im so bratty to himand idont understand y i am im not bratty with any1 else im usually verywell behaved but not with him...