Girl, I'm in the exact same boat...married 15 yrs, 2 active kids, 7 pets, and started a business a few months ago... When I do get a few minutes the last thing I want is to have sex. It's so hard to get out of "mommy mode" and into some sexual goddess mode. I don't know about anybody else, but I need time to make that transformation emotionally.
I don't know what the answer is, but I do that know that the following things are wrong in our relationship:
-we don't get time alone together. maybe we just don't make time because we have a hard time communicating that often we end up arguing anyway. We can argue at home for free!
-We don't communicate...flirting and laughing are important parts of a relationship. I think that they are the things that make us fall in love in the first place.
-There's no affection. If we're in the same 3 foot radius, it's considered fore-play! I would like more affection for no apparant reason!
-Guys need to try a little... even though we're married, we still need to be romanced. Don't just say..."are you ready? here I come!"
-And lastly...he was much more attractive before I became his "mother!" Can we really be excited over a guy for whom we clean his dirty underwear, bathroom aim problems, hear his nasty sounds, etc.?
I think that sexual issues are more a symptom of other issues in the marriage rather than the cause of the problems...
I don't think that it's mostly you...it's just life...take the good days (or weeks) with the bad and just do the best you can! Sometimes I have to just poke myself to make sure it's still alive...LOL