We don’t have sex anymore

Needing some advice. My SO and I barely have sex anymore after moving in together in Jan. It bothers me a lot but when I tried to talk about it with him, he made me feel like it was such a shallow offensive thing to ask for. Now I don’t know what to do. I can’t initiate because he feels like I’m pressuring him and he shuts me down. And he hardly ever initiates. I want to prioritise sex but he doesn’t think it’s that important. We can’t talk about it without someone getting upset and taking offence. How can we get past this?