Struggling with Intimacy Rant

Lately my fiance seems to be even less interested in sex with me than usual. He's always been shy and already has a hard time with his confidence when it comes to being intimate, especially if he's the one initiating, but it feels like unless I'm the one making the first move, we never have sex anymore. I know it's not his fault, but at 30 weeks pregnant, it's starting to take a toll on my self confidence and I don't feel like I'm attractive to him anymore despite the fact we've talked about this and he reassures me that it's not the case. We've talked about it and I've asked him if there's anything I can do to help him feel more comfortable and confident in the bedroom, but he tells me he doesn't even know what would help. I just feel lost, I miss him, and I don't know what to do. I want to help him feel comfortable and confident, but if he doesn't even know what would help, I wouldn't know where to start. Rant over I guess