used to be

• *çok anlayamadım aradaki farkı bilip paylaşan olursa çok sevinirim.
  
  ı used to drink coffee every day.
  ı was used to drinking coffee every day.
  refer to a past habit? ıf not, what is the difference?
  
  yes, they both refer to a past habit, but the meanings are different. "used to" is used in two ways.
  
  ı used to drink coffee every day.
  
  this just recounts what you drank and how often you drank it, and implies that this was in the past and you don't do it any more. this usage of "used to" means that something existed or repeatedly happened in the past but does not exist or happen now.
  
  ı was used to drinking coffee every day.
  
  this describes how your body handled drinking coffee every day. the meaning could be "ı used to drink coffee every day and ı was accustomed to it, so it didn't make me feel agitated. but if ı did that now, ı would never sleep at night.
  
  this usage of "used to" refers to being familiar with something so that it seems normal or usual.