so basically i get into an argument with my partner but at the same time i have this internal conflict about how i should handle this situation. i say horrible things but then its like another part of me comes up and apologises and says that i dont mean it but then i go back tot his other part of me who just wants to cause the most damage that i can but then i go back to being caring and sorry for what i just did. and this all keeps happening so quickly in a matter of seconds. 

its like these two parts of me are constantly fighting inside my head idk how to properly describe it. its just so confusing to people i am arguing with because one minute i am sayign the worst things ever but the next i am apologising and crying.

is this a bpd thing??