Is this okay in a relationship? What do i do?!

This is an awfully long story but ill try to make it quick and to the point. Over a month ago, i cheated on my boyfriend of a year. I was at a very weak mental state and was very easily peer pressured into sending a nude photo to someone who i thought at the time was being a good friend. Immediately after, i felt horrible and confessed everything to my boyfriend to which he was justifiably furious. The initial fight consited of about 4 days of nonstop namecalling, threats, and overall hurtful behavior from my boyfriend. This constant conflict really got to me and i began cutting and contemplating suicide which my boyfriend used as leverage to get my parents involved in the situation, while at the same time he was still furious and even going to the extent of TELLING me to kill myself. At the time, i thought i deserved it. Now, its been over a month and he will use any excuse to get mad at me again. From seeing the boy i sent the picture to in the hallway, to trying out for the poms team (which, according to him, is an inherently "slutty" sport), to wearing a shirt that was too "low cut" for his liking (although it was well within school dresscode limits), he finds every excuse to get mad at me, publicly humiliate me in front of our friends, and call me a whore. He says he is completely justified for this because of what i have done, and i believe him. Is this true? What do i do to fix this? (please dont ask me to break up with him because, to be completely honest, i won't listen. I love him too much and hes been my best friend for years.) sorry for such a long rant!