body confidence.

I'm a on the plus side, I'm the biggest I've ever been, my fiancé loves me for me and still finds me sexy etc, but it's taking its toll on my sex life, like I don't feel sexy at all... I'm not motivated to lose weight.. it's hard for me to do cardio as I have a bad back and bad knees...  all this just makes me not want to have sex. I'm always worried about what he's thinking.