I'm gonna concur with the above replies. Low sex drive sounds like an excuse he is giving you to end the discussion, possibly because he doesn't want, or is unable, to deal with the real issues.

But, if low sex drive is really the issue, then research suggests that an increase in sexual activity in one area of your life translates across others. For example try getting him to read stories here and maybe you can each suggest some favorites to the other with things that interest you, or try watch videos, an increase in these types of sexual activities may lead to an increase in his overall desire level and pay off for you both.

Good luck, keep talking and I hope it works out for you both =kuri