Is this acceptable after 12 years together? Am I wrong to feel this way?

So I've been with my partner for 12 years. Our sex life has not always been the best but it's not so much the sex but the intimacy of being close I miss. As the longer we are together there seems to be no sex and no closeness. At night he keeps to his side of the bed and there's not even a cuddle from him. It's been fading like this for a while. I've tried talking to him only he says it all in my head and I'm insecure and needy. Then the other night he cuddles uo to me it feels great but then he has a cramp and that's it. I do sit down and talk to him. Only he gets angry and says he works he's tired and what do I expect. It's driving me crazy and he has never been a person to ever compliment me not ever but when I ask what's wrong he truly does seem to think nothing is wrong. He doesn't care if I get chatted up or if I get attention. I know it sounds like he doesn't love me but he say he does and that I'm all he needs. . Just there is no oomph with him there nothing.

As I'm writing this question I think I'm also seeing and giving myself the answer

Is this acceptable after 12 years together? Am I wrong to feel this way?
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