Am I (17F) overreacting to being called "(Boyfriend)'s chick"?

(17F, 19M, together ~ 2 years)

I'm never referred to by my own name, or even as his girlfriend, only "his chick". It makes me feel like an object, a piece of property. Every introduction to any of his friends is pretty much the same: "This is my chick"- not even mentioning my name. Every time I try to avert the inevitable and say "Hi, my name is <name>" I'm ignored and spoken over. "So this is your chick, huh?" Every time I bring this up (and I have been for months) he always uses the excuse "It's just the way we talk", "You're overreacting", "Stop over thinking it with that feminist bullshit".

This happened again last Friday, and I'm ashamed to say, I just blew up. "I'm not your fucking chick, I have a fucking name!". I just walked out. And now I'm in the wrong because I "embarrassed" him with my "feminazi tantrum".

I've tried to articulate my feelings for months and he's either incapable or just unwilling to try to understand. I don't want to be "that girl" and break up with him over something that seems to insignificant to everyone else, but it really makes me feel used and unappreciated. This can't be a normal way to refer to your SO, can it? How can I get my point across in a way he can understand?

TL;DR: I'm referred to as a piece of property, and ignored when I ask to be called by my name. I just want to be treated like a person.