My boyfriend keeps pressuring me to have phone sex

Every once in a while we will have phone sex but now he is starting to ask every day due to us not seeing each other because of covid. Sometimes I enjoy it, but other times it can feel awkward because I live with my family. I’ve told him it’s easier for him to have privacy because he lives with his brother and roommate so I would rather to talk on the phone or watch a show/movie together over the phone. I don’t want every conversation to be sexual. He says our conversations are not always sexual because he talks to me thorough out the day but I feel like it is because of how frequently he asks at night. If I say no he says “This is what worries me, I feel like you want to be with someone else. You always want me.” Then he brings up us not seeing each other because of covid. I feel like it’s manipulative to say I want someone else because I turn down phone sex and I always reassure him that I’m attracted to him. How can I get him to stop asking?