Is he controlling?

My Boyfriend doesn’t likes when I pass gas or when I burp in front of him. He tells me to go do that somewhere else, or he gives me this look like I’m disgusting. He makes me feel Bad in I go in excuse myself whenever I have to do that. I know I’m a woman I have to be lady but I feel like I’m not normal in sometimes I feel embarrass when I have to excuse myself from him without him being mean towards me. Should I have a talk with him in let him know that What I do is natural thing? Or just continue to excuse myself every time I need to do so?
Is he controlling?
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