make up, try wearing clothes that are pink and red or bright colors, curl your hair and tie it half way up, try putting nail polish on your fingers and toes, and make sure you wear some jewelry, and maybe put on some purfume, and while you're at it, why don't you start walking a little like small steps one feet in front of the other which is more feminine and makes your butt kind of move up and down. hahahahahahah LOL
nah but some jewelry should do the trick, like paerl necklace and earings.
I sometimes have that problem too, I swear, love sports, and in general act like a dude (mostly because I was raised by six manly uncles who wanted a nephew). I found that wearing...and I know this will sound ridiculous but, a pair of nice panties on those days I know that I'll be particularly dude-like. It kind of acts as a reminder that I'm supposed to be at least a little girly. If that fails, try a pair of heels or strappy sandals (whatever you feel comfortable in). I know I've never felt comfortable in skirts, they don't allow you to move and have fun without flashing somebody!
But a lot of guys like a tomboy, so don't get rid of all of it. In the end just do what makes you happy, if you're happy with being a tomboy then be a tomboy, tell the rest of the world to kick rocks if they don't like it. I always have to tell myself that.
Makeup and clothes mainly. Do your hair nicely whether it is up or down. You dot have to heat style it or anything, just brush it nicely and take the 5 min it takes to make it look nice. I love doing smoky eyes or gyaru makeup with fake lashes, look up looks online that you like and there will be tutorials on YouTube for you to recreate the looks
from your pictures... you look very feminine. I don't know whos telling you this cause they must be crazy. if you like to keep your body fit and play sports, that shouldn't be considered masculine or tomboyish :P you have an advantage that most girls don't cause guys will like that :)