I'm the same way. I'm a t-shirt and jeans type of girl, don't do the dresses and girly thing. Don't go tanning or wear lots of make up or anything like that. Guys usually make fun of me for it telling me I'm more manly than them which kind of used to bother me. But I finally found a guy that didn't want me to be like those other girls and it's made me feel a lot better about myself. He always tells me how he likes that I like video games and sports and sitting around drinking beer with him. If they ever make comments to you just ask them why they're so concerned in the first place. Obviously they're projecting something on you that they don't like about themselves so just let it go. And maybe come up with a witty comment to kind of back hand them a little bit haha (that's what I do)

Like when 2 guys I work with were saying how I shouldn't have cut my hair and that they think long hair looks sexy on girls I said "well good thing I don't want to bang either of you" and they shut up lol