If I don't buy something for my boyfriend because I know it's not good for him, does that mean I don't love him?

My boyfriend is obese and has high blood sugar than what people his age are supposed to have. He still eats whatever he wants carelessly and asks me to buy those things for him. I denied buying those things stating that it's gonna harm your health. He stopped talking to me and threatened to leave me stating that i don't love him. Am i wrong or is he wrong?

If I don't buy something for my boyfriend because I know it's not good for him, does that mean I don't love him?
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