Boyfriend's mom is getting annoying?

Well again my bf's mother is being a pain. After 6 months that we've been dating she says that I'm nice and everything but I'm not for her son. She judge me because I wasn't born here, because I don't have enough money, because I'm a little bit dark (tan skin) because I'm Colombian, because for her I'm a gold digger which I'm not cause unlike my boyfriend I work I pay for my bills. She just doesn't like me. I don't know what to do or behave because I know she's been saying all that stuff to my boyfriend so that he can break up with me.
Boyfriend's mom is getting annoying?
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