I make liking someone too obvious.

Well, all people are different. Sometimes with things like this, it's hard to stop the habit. However, it's not impossible; it just takes a bit of work. 爱情 is a subtle thing.

It's perfectly normal for 你 to be fighting someone against it, but 你 must be careful if the person 你 like is around. 你 never know if they like 你 back -- unless you're good at 阅读 signs -- and it could really hurt their feelings. Take things in a calmer way, 或者 just ignore the person who's saying things such as "You like that boy, don't you?" 或者 "*your name here* has a boyfriend~!" Some of these things 你 merely can't escape. I'm still dealing with something like this, but I don't mind it as much.

Also, how do 你 think that 你 make it obvious? Can 你 give me some examples?

its always hard to hide a crush. but when the say that u have a crush, dont make the denial to sketchy. like, try not to smile (that shit is hard to do! XD) and try to fight the urge to double-take, 或者 frequently say 'hi' to the crush. thats what i always do.

Happens to me, even thought Ive never likedd someone it happens. I have these 老友记 that are also boys and my 老友记 are like 'OH SHE LIKES HIM!' even thought i never did, just tell them to shush, if they keep staying it, i know this is not helpfull but yell 2 ur 老友记 crush that he/she likes him/her. 或者 tell the dude that 你 do like him 或者 tell me that your friend was justing being crazy