Are you sure you should be dating a girl, m8? Nah, I kid. If you're really curious about it, maybe suggest dressing her up as a guy. In exchange, she could dress you up as a girl. Or if she mentions how feminine your figure is, say, "I wonder if I would look even more feminine with girl clothes on." Something along those lines. Or you could just throw on some stupid female clothes and show her. Maybe she'll suggest giving you a makeover. -shrug-
Are you serious!!!! Be a man to her and dress up like a man to het, but when it comes to you staying alone you can tell her you can do on me the boyfriend make up challenge