how do you get alcohol addiction?

You can get alcohol addictions because alcohol have an effect on your body. It can give you exicitement, happness and thrill. Some people enjoy exicitements so they want to drink it over and over again. Soon they will get alcohol addictions. Drinking alcohol also can help people escape stresses when they are depressed. When they want to forget about them, they usually drink alcohol.

I drink a lot everyday since 15. And I now cannot get rid of it.

because after I've tried alcohol, I can't stop myself drinking it.