Your definitely not alone, I can go weeks without

OH is lovely and we are very 'cuddly' but we both work hard, he works particularly long hours and it can kill his sex drive and I'm often out late riding and teaching, so by the time I'm home, have cooked and had a bath all I want is to curl up and doze off!
I had a lot of sexual issues in a previous relationship and OH has been so understanding and gentle and generally fab (we joke that he 'fixed' me), and sometimes I feel guilty for 'pestering' him when I know he's tired.
We try to balance the need to BD at the right times with keeping it fun and light-hearted, at the end of the day it's meant to be fun!