How will I control blushing and hot flushes when infront of the guy I like?

You are supposed to get flushed (blush/turn reddish) when you are near the guy you like. Why do you think they invented rouge? To simulate blushing and look more attractive.

it is just natures way of getting your guys attention. Fan yourself, it looks attractive also. Remember the old movies when women would carry fans? when they talked to a guy they liked they would fan themselves while being flirty?

Now-a-days they just call it getting "hot". There is nothing wrong with you.

once you're talking keep talking for a while (so you move from small talk to a normal sized conversation). after you do this 2 or 3 times you won't have a problem talking to him even when you don't see him coming.

be wary of being callous once you are used to him tho. you don't want to come off too cool, just relax!

i agree with kaching and sometimes blushing is cute to guys you shouldn't feel bad about it but the sweating yeah just cool down don't act like the guy is you're everything and anything just act like he's a normal guy a friend you've known for a while and breathe deeply if you get overwhelmed try going into somewhere alone like a quiet room muffling your voice and screaming really loud and jumping let out the energy I know it sounds crazy but it works I was crazy about this guy that I started like stuttering and having butterflies so I went into a room and just shook it out and let out the energy. notice your surroundings when he approaches you take a quick deep breath and remind yourself he's just a human being relax and be confident. Good luck

You'll start to calm down the more you see him. These are just signs that you like him, but since he's approaching you, you don't have enough time to think about it happening.
Its a natural reaction, no matter how gross it may seem. You body temperature starts rising around him and your palms probably sweat. It took about a week of me dating my boyfriend before his stopped. On the plus side, I found out the same thing was happening to him :)

um you should try to control your self and once you start to see every day you will be more claim. eventually you will get comfortable around him.

figure out what is that embarrasses you about him
like is it what he says or how he looks.
and talk your way thru it. like tell your self there's nothing to be embarrassed about
because there's not.
prepare yourself for what he will say or look like
and figure out what you will say or do back
because if you're prepared you won't be as nervous
right!