regardless of what you may hear, your wife is not experiencing MLC, you have killed the attraction between the two of you because of unattractive behaviors you have been displaying for quite some time.
Attraction isn't just based on how you look, men tend to be more visually stimulated attraction wise but with women, attractive behaviors and characteristics tend to be prime factors in stimulating attraction with them.
You've been at this too long for very little or no results.
Let go of her, not in a sad, sheepish way but in a way that says "you want out so badly? I'm not holding you back, the door is there, please use it at your earliest convenience because I don't want you or need you to be somewhere you don't want to be."
If she wants to label what she's doing as MLC, depression, finding herself, whatever, who cares? You can't control her, what she does or says and seriously, you wouldn't want that responsibility of controlling her either, too much trouble and hassle for no reward.
You can control you, let her go, move on, the quickest way to getting a wayward spouse to notice you is to remove yourself from the picture and move on with your life without them. To do anything else is to communicate low value and pursuit to them and you are better than that, we all know this.
