So, first off, Hi All!
Sorry to hear about your situation, you are not alone, some of us on here know the pain you feel all too well.
after a heart wrenching soul baring conversation on my part about how it makes me feel... Depressed, disconnected from her, undesirable, completely un interested in our marriage....
Vent away, it's a p*sser - probably for both of you.
You should actually be working out more and taking better care of yourself. You appear to be on the verge of depression if not there already. Don't be dragged down by the situation with your wife. Physical activity is the best treatment for that.
It signals that you are not a victim. It can also send a message to your wife that you are not going to mope but rather going to take charge of something. It could also serve as a subtle message that you are interested in being attractive to women and, maybe, not just her.
When you take control of your body you will have confidence to make some of the hard decisions ahead of you. You will also be ready to go on the dating market when you are ready if it comes to that.
But mostly you need to feel good about yourself and realize that you ultimately have control of yourself, your decisions, and your future; taking care of the vessel that is your body is the best way to do this.
Why do you address you "low libido people" comment to just the women?