Can I save us

I love my boyfriend and he loves me, he looks after me, we know each other so well and I love spending time with him. The sex used to be amazing he is the only person to bring me close to orgasm! But ... Our sex life has rapidly fell down hill. Iv been trying to talk to him sensitively on how we can improve and what I need from sex but he takes it badly and laughs it off like there is nothing wrong, obviously he is embarrassed that I don't feel satisfied. The last two times we have had sex (we don't even have regular sex any more, we are down to twice a month) has been aweful, I hurt from not staying wet, he doesn't last long, just one position and we are done. Iv stopped moaning during sex now which has really put him off and stops him from getting/ keeping up. But I don't have the heart to fake it because if I fake it it won't get better. It just feels like I'm having a large tampon rammed in and out ..... Last night he had a go at me for not admitting I don't enjoy sex any more, but it's just something I don't want to have to say to him. I told him I'd rather he just ran his hand up and down my body rather than having sex, because it gives me more pleasure. Should I start from the basics with just foreplay for a few weeks and build up or are we doomed.