How can i stop myself from blushing?!?!?!?

u see, i kinda have this problem that i haven't been used to for a while, i mean, i am a quiet person in school who barely talks so when i talk in front of the cl for a report i always blush, or 1 time i was reading and my friend made the whole room quiet so everyone could hear me read, even though there r different groups reading different things, so i read a few sentences more and i am not used to the center of attention anymore, so i blushed, i could tell, my face gets hot. also, when teachers yell at me, i blush, my face gets hot. But that is normal for me. the thing that hasn't happened in a while is when i have a crush on someone, i blush, once again, my face got red i could tell since it got hotter. I liked a few people before, but my last crush i liked for 4 years, but he suddenly faded out on me and for some reason i like my dad's friend's son. I don't know why, i was sitting in homeroom at activity period, as usual, bored as heck, looking around and i see him walk in with a p and he was doing xtra credit 4 french, and i just saw him and i thought he was cute, then as he was sitting down the teacher was telling him wat 2 do and so i decided to go over & ask if i could go to my locker and so i waited until she answered me so i stood and waited and checked him out when he wasn't looking and he just looked so cute doing his work and then i didn't want to seem like a creeper staring at him so i looked away then i think he checked me out & i was like oOo i'm lovin' this moment, then i blushed, was like o crap i blushed, then the teacher answered, i left the room and came back. I mean it has happened before, but my last crush was talking to me alot since he is a nice guy and the only guy that starts conversations with me, but i got so used to talking to him that i didn't blush around him. woa that was a lot of words. so, how can i not blush around him, we might be having a party at my house so there won't be a lot of kids and i'd like to get to know him better, but i don't wanna blush!