Am I wrong for this

So my boyfriend and I are always coming yk with random ass nicknames for each other, like honestly he could call me his slutty toaster and I’d think it’s the cutest shit ever. Well recently his nickname has switched from new Dick (cause he got a new phone number 😂🤷🏻‍♀️) to my toxic chocolate. He thinks it’s as funny/cute as I do and I honestly got it from a song that was released not that long ago by one of favorite rappers. So usually I’ll change his name in my phone to whatever I’ve decided his nickname is for the time being which I did with the my toxic chocolate I ended up sending a ss of me and boyfriend chat to my bestie cause my man goofy as hell and my bestie seen his name and got so fuckin pissed at me. I was honestly caught off guard and she said because I’m white I have no right calling my boyfriend something like that and it’s no different than if I had his name as “my nword” so obviously I got defensive and escalated the situation cause I felt like she was disrespecting me and my man. I honestly dont really see what’s wrong with his new nickname since we both are ok with it and he thinks it’s funny and laughs hella hard when I call him that and calls it his song n shit. But I have this bitch over here calling me pretty much racist. Idk am I wrong for getting so upset with her and for calling my boyfriend my toxic chocolate.