Seen as the "muscular" and "more manly" of my friends. Help?

Hi. So as you can see, I am a female. I have very few female friends I hang out with, but every single time I hang out with them, I am seen as the more masculine of my friends. I am a straight girl, but I am often seen as this because I am a workout junkie (I work out twice a day 5 days a week and have a build VERY similar to Jillian Michaels), have short hair, and I recently enlisted in the United States Army. In public, I am often seen as "butch" and most people wouldn't even guess I have a boyfriend unless I am out with him. How can I stop people from placing this unwanted label on me. Hell, I am even told I have a pretty face, but I look like I work out too much...