Advice, help

Ok so iv been married just over a year, have a great relationship, but over the past 6 months, I'm lucky if we have sex twice a month.  We have always had a good sex life.  I know sex is not everything but I am struggling emotionally without this connection.  We have been trying for a baby and at this rate it's never going to happen if we aren't BD enough.  I have tried speaking to him, he says he wants it all the time, doesn't show it, I can tell he's embarrassed when I bring it up.  I have bought new underwear and at times he's sleeping before I even get into bed lol.  I don't ant to beg for sex.  I know my husbands still attracted to me because he tells me, and I haven't changed appearance.  I just don't know what's going on and I feel so frustrated it's getting me down and affecting our marriage... Any suggestion, advice or help??? Please? In desperate