Are all mothers like this?

Why my mother doesnt like my boyfriend? Im 31 years old and so he is, he is my first boyfriend. He is a divorced man with three little daughters. 
At first she was happy and liked him and everything was nice. I met him on July last year and become boyfriend and girlfriend on October. He is a nice, respectful and resposible man. But later my mother start complaining about him, she tells me "you should find someone else with no kids, you deserve better and all these years being virgin, at least give it to someone with no kids" idk but seems that for her love is not important. 
She gets angry whenever i mention something about him, she is all about drama, "oh my god he is your idol now? Im your mother you should care more about us your family, he is not going to replace the love we give you" ... 😑 idk why she says things like that, she see me happy. I really dont like the way she express now about me. I already talk to her about it but i think she dont care about what i feel. 
What should i do? I sometimes want to go and live with him now 😅 (yes he asked me already)

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