@tomster,
Please don't change just to make everybody else happy. Speaking as a guy, I think hetero tomboys are often quite hot, and wish I knew where to meet one (at least one closer to my age—I'm markedly older than you, and too many tomboys give in to get along as they get older). You simply hold onto the identity that makes you happy, that gives your life meaning, and as long as you aren't rubbing mud on your face to keep people away or anything, the right young man will recognize the spark of originality in you.