L., I know some of your frustration. My husband and I have very little in common, as far as music, theater/musicals, books, etc. But we have found ourselves enjoying time talking about politics, which we DO have in common, as well as spiritual matters, which we share common beliefs AND helps us discuss our kids and family and how to better our relationship.
Do you have anyone to watch your kids? It sounds like you could use a weekend get-away or even just a night out together. :) Maybe even just having some couple time in the evenings (even if it's only 20 mins.)...maybe give each other a massage or make some popcorn and watch a show or movie together. If you can get someone to watch your kiddos for the night, get a hotel room and spend some fun together or out on the town. My husband got a room for a weekend once, and we took our kids and had a GREAT time! It was just nice to be out of the house, where we could see everything that needed to be done, and just relax together. We got to go swimming and just have fun. It was great!
Not to get too personal, but what about vamping up your sex life with a new "outfit"? :) Go shopping for one together, if you like and he's willing. Or, have him surprise you with a new one. :D It is a special time and bond between you two, so live it up! Enjoy each other and your time together.
Okay, so now that you're probably blushing, (lol) I hope you find comfort and relief soon. Life is too short not to enjoy it; so, go...enjoy! :)