help me , cant aim to head :(

just aim for the head dude -.- not that hard

I'm afraid there is no actual tip.

Oh there is excuse me:

lower your sensitivity progressivly like -1 or -2 every 5games.

Your hs/kill ratio is about 0.22. Thats good, imo.

depends on a rifel u use, ak47 start at belly and u have HS xD; btw my mous sens is on 3 no unwanted movments

Now i don't know what weapon, but for ak's and such aim for chest and just spray.
For m4's aim at the very top of the head then just shoot 2 single shots.
For the Sniper Rifles the obvious thing is to aim over chest, even though chest is 1 shot kill.
For the uber spray weapon i suggest you keep it to the chest...as it's better than failing.