Why won’t he call me his girlfriend after 2 years of dating?

We’re in contact all the time, meet often and exclusive with each other. Whenever we bump into his friends by accident, he doesn’t introduce me at all, or when he does he refers to me as his chick or lady friend. I haven’t brought anything up cause tbh where I live, it’s not like I can find anyone better than him, even though I know that I deserve one. Any advice?
Why won’t he call me his girlfriend after 2 years of dating?
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