Based on my experience, I would say it is the disease. My AH always had problems in the bedroom - mostly stemming from the physical detriment that heavy alcohol and pot use causes in men. From there, came his lack of confidence and unwillingness to try anything new, and being unable and unwilling to really ever talk about our sex life. The ED was so prevalent at times and took its toll on my self esteem. At times I didn't want to have sex with AH at all because having no sex was better than having bad, awkward sex with a half limp ****.
Congrats on losing the weight! I bet you look and feel amazing, the confidence over flowing from your every pore. Rock it if you got it!