Hey, I'm another female-bodied-not-really-female-though person who doesn't want a haircut!

I reckon binding helps a lot, as this gives your figure the less feminine shape you're after. Don't try and change yourself entirely (after all, this is all a process of self-discovery, not an exercise in forcing yourself to be something you're not), but maybe if you adopt a few more stereotypically male mannerisms (nothing big, just the way you sit and walk etc.) this may alter peoples' perception of you too? In addition, if you tell people around you to refer to you as male, new people you meet will pick up on that and probably copy them because even if they do initially perceive you as female, they will assume they're mistaken and reconsider. After all, makeup can make it hard to tell!

Erm, so yeah, those are my suggestions... good luck!