Am I really a tomboy?

As deadweight mentioned, tomboy is more of an attitude, accompanied with maybe the dressing style. Maybe you need to increase your wardrobe of outfits. I know that a lot of times my attention is caught when girls dress differently; for example, back in my univ days every girl wore tshirt and blue jeans. Damn boring; then suddenly I caught a girl wearing a skirt and some nice blouse. Suddenly she had my attention just because she looked different and that also led me to believe that maybe she was different than the rest of the uncreative girls that wore tshirt and jeans every day.
Also, you can look really nice without makeup and all that jewelry stuff, but again, it comes down to how you carry yourself.

you look like your cruising for chicks like a stereotypical guy does "supposedly"

A tomboy is not about dress as much as its about attitude.

Try adding something to the mix them helps us know without knowing you that you like men - some kinda jewelery, maybe around your wrists - lipstick - maybe something girly in your hair like a barrette - paint your nails, don't worry if they get chipped or not.

Hmmm. In college, it was t-shirt and jeans for me almost every day. Still, all it took to get attention from guys was a pretty ribbon in my ponytail or pink laces in my sneakers. And the tomboy thing never came up. Let's face it -- attracting straight guys is SOOO easy, if that's what a girl wants to do. So then the real question becomes -- do you WANT to attract straight guys? If so, you know what to do.