It is indeed the case that sex is not the only issue in our relationship. You were absolutely right that she has lost the passion for life, but she seems perfectly happy that way. The sex issue is one of the biggest wedges driving itself into our relationship, but close on its heals is the fact that she won't even go out to dinner with me or do anything normal people do. I'm only 35 years old, and I feel like I have the relationship of a 70 year old. I'm not content to just sitting around waiting to die. I don't want a girlfriend who waits at home for me while I live my life. I want someone to live life with me. Together.

Your last couple suggestions are very reasonable, but she doesn't listen to reason. I have long since stopped attempting to reason with her. I don't tend to think of her as particularly dumb... but I don't know if she's incapable of reason or just simply doesn't pay attention to me.