>>731436
>I hinted to the conclusion that I was the problem and that she would probably be way more sexually active if she was married to another more interesting man. She denied it and got really sad for a few days.
That is the truth mate.
She is probably already cheating on you or she's going to.
My solution? Self-improvement.
Put all your free time into bettering yourself.
Start with getting /fit/ and then move on to develop relevant interests and becoming a responsible person that she can look up to. Being a leftist is pretty much female-appeasement, and no women is yearning for a man who is appeasing her, after all, they get all the positive attention from such men for free.
If you weren't married I'd tell you to dump her, but you just have to deal with her and do your best and hope that she comes around.
So basically stop appeasing her, provide her with the bare neccessities and withdraw from her intimately. Be there for her as a stoic, solid presence that she can rely on, but don't rely on her emotionally, because that will cause her to despise you.
After some time, if you do well enough in developing a stronger character, she will find herself being drawn to you, because
a, she will crave the attention of the "new you"
b, if she feels like you don't need her while at the same time you become more attractive, she will feel like she has to up her game
Do not expect her to change for you. Yes, she should, but she has no respect for you, so she isn't going to do it. You have to take all the responsibility for everything in the relationship, even if it's not just. That will build your character and make you a reliable, strong presence.
If she leaves, move on with your life. If she cheats, divorce her and find someone better.