You're trying to turn your girlfriend into a man?
To be fair, I spent several years of high school being a pretty normal teenage boy. It was all a big sham and I went home every evening to cuddle my cat and watch Cardcaptor Sakura on TV, but for what it's worth I think I put on a pretty good act. Unfortunately it carried the small side effect of making me mentally unstable and borderline suicidal.

So not only are you fighting against my nature, but you're fighting against a mind which subconsciously equates masculinity with feelings of extreme unhappiness and self-loathing. Good luck with that.
