Want to get the point across that you ARE a man to her and let her start to FEEL it...
I would recommend this....
How about kicking her butt out of the house by telling her to get her own place, telling her you have now decided that you won't share your women with anothter man and it isn't even up for negotiation. Tell her the sooner the better. No more.
Start watching action movies, get involved in a COMPETITIVE SPORT,practice being decisive, rational, and logical. (all male type qualities.) Follow through on things and keep your word. (all advice from John Gray regarding the "sensitive man")
These things make sense to the more "manly men" (no offense intended) the sensitive man doesn't totally relate.