What’s the best way to express my feelings to my boyfriend? I’m 32 and he’s 54.

My boyfriend is 54 and often tells me he desires me. A year ago, when I moved in, we were making love three times a week, but that has now decreased to once a week, and lately, it's more like every couple of weeks. I understand that the age difference might be a factor, but sometimes I can't shake the feeling that something else is replacing our intimacy. How can I express my feelings to him without making him feel blamed? He claims to desire me, yet I don't see that reflected in his actions. He often says that actions speak louder than words, and he doesn’t want to feel pressured or that it's a chore, so I’ve tried to stop asking. I’m always ready when he wants to be intimate, but when I initiate, it never feels like the right time. Am I wrong to feel this way? He often tells me it's just my insecurities.