Instructions: Read the case study below. What is my diagnosis (1)?

I am a 27-year-old female presenting in the ER after my boyfriend found me cutting my arms with a razor. This is the third romantic relationship that I have had within one year. I am currently unemployed, after quitting college for the third time. I have tried majoring in cosmetology, medical assisting, and business, but "none of them are for me." My mood is unstable.