Lack of interest from partner

Cez • 35 years old, mum to a little boy and I`m engaged to the most wonderful man. Trying to conceive since February 2015
It's exactly a year that we've been trying to concieve. I'm four days into my fertile week for this month and we haven't tried at all. It seems he doesn't want to be near me, let alone be intimate with me. I feel so upset, confused and alone right now😢