No sex

It's a bad thing when your husband no longer wants to have sex with you right? We have only been married a year and 2 months and he doesn't want to anymore. He has never had a very high sex drive, but I have to beg him for it once a month if that now. And when we do he seems so far away and unattached. Just laying there, eyes closed, no touching... just... there. Maybe it's me? I've been trying to talk to him about it to see if anything is wrong and he says he is fine, he just doesn't want it.