Don't beat yerself up BTFB, I have days when it feels like a chore to go by bike and I leave it at home.
Cycling as you know is complusive and some days we simply don't have the compulsion.
It'll be back with you soon, along with better weather, fingers crossed!
*Imagines BTFB flying on his bike to a soundtrack of sweeping arpeggios played by the 'Malmster'*