You didn't give an age, so in part, i'll wing it. The younger you are, the easier it is to pass. Young males either prepubescent or in puberty can be somewhat androgynous. That doesn't mean you have to be in that age group, but if you are even in your early twenties, you can pass as a much younger guy.
Depending on your size, you might not need a binder, just a large shirt. I was an A, so not a real big deal. You can offset any breasts by doing some lifting. Bench presses can increase muscle and make mammary tissue less noticeable. Side arm lifts will widen your shoulders which in turn make your hips less noticeable.
Some things are probably natural. The way you walk for instance, is probably already ingrained and won't need work. Regardless of whether or not your voice is high, midrange or low, stay quiet. That doesn't mean don't talk, just don't talk unless you have something to say and keep it short. Watch the way other guys interact with each other. Take a few days and sit at the mall and just watch guys go by. Re create their speech patterns.
If you are heavy, drop some pounds. Extra padding increases the size of the hips, and fat makes estrogen.
If your hair isn't already short, get a short cut in town, then go to a neighboring town and really get it buzzed. Use an alias or a name if you have to and pay cash. I used to go into the city where no one knew me and get a crew cut. That sounds kind of radical, but I didn't want to leave any doubt that I was male. When you ask for the short cut, don't falter or get shifty, either tell them you want a buzz or a boy's regular. If you say it with confidence, they won't question it.
Wear loose clothing. It hides the hips and breasts, and while it might not be the style for females, it is for guys.
Be careful with packers. Don't overdo by trying to get the biggest. You don't need to draw attention, and if you look at most guys, they don't have a big bulge unless they have something on their mind. lol There are a number of places that make good, lifelike packers.
If you really think your voice is high, practice dropping it an octave. Its easiest to do if you talk quietly. Not all guys have really deep voices, and if you listen to young guys talk, even into their twenties, often times they haven't deepened that much.
Its ok to flirt with girls, but I wouldn't try to date. There is more physical contact earlier these days and you don't want to blow it because a girl gets handsy.
Other than that, be yourself. You probably already don't fit in with girls because of your walk, talk and behavior or lack there of. I wish you luck.
sam1234
