The thing is, for MOST guys sex is physical first and emotional second - the physical connection of sex gives them an emotional connection to their partner. For MOST women, its the other way around: an emotional connection to their partner makes them want the physical connection of sex.
What I have found helps to slowly regain that libido is to think about it during the day... think about your man and about whatever your favourite feature of him is... remember a past "encounter"

that you really enjoyed... imagine recreating those moments... DON'T tell your man what you are doing - you'll put too much pressure on yourself to follow through - but rather do your best to initate a little fun at whatever point in the day seems to work best for you... and remember: the more us women get, the more we want (gee, sounds like chocolate!)