Well, if it makes u feel any better, my DD is 13mths old and I still "don't feel like it". What might make it worse is the fact that I don't hurt, I have just lost it.
I participate mostly out of obligtion. On the very rare occasion I feel it myself but on balance, it wouldn't worry me if I didn't get it at all at the moment.
I think as much as anything, for me, it is the fact that altho I am a SAHM, I never have any real time for myself and DF seems to think that any time that I am not "doing something" is time that I can spend, well...doing him I guess...lol. The pressure from DF doesn't help to get me in the mood either, it is almost like his desire for it depletes mine, makes me almost angry sometimes...I get very defensive and frankly feel like a failure as a partner which again adds to my lack luster in that dept.
I can't really explain it properly but I guess for me it is the fact that someone is wanting something from me all of the time. An hour in front of the TV is not "me time".
I also think that the after baby body plays a big part in it too - try not to be too criticle of yourself. Take the time that you need. He will just need to deal with it. You are not a machine.