Addictions can really affect your life in a negative way.One can feel as if he's chained by these addictions because one really cannot live his life fully without wasting their time and money to consume these addictions.People can be addicted by drugs,junk food, even their smart phones.These addictions may give us temporary pleasure but in the long run it's like poison which effects our life negatively.Once you start smoking,for example, you get addicted to it and then it gets difficult for one to leave smoking.You get temporary pleasure out of smoking but at the same time you are digging your own coffin in the long run.May God keep us all safe and prevent us from getting addicted to unhealthy things.As far as getting addicted to studies I don't know if that is a good thing or not Haha!
Peace!