Will I be addicted to caffeine? If I drink coffee everyday, will I be addicted to it, or is it just a myth?

Is there any risk to my own health due to caffeine?
According to this review published in Psychopharmacology, it is very much not a myth.


  The caffeine-withdrawal syndrome has been well characterized and there
  is sufficient empirical evidence to warrant inclusion of caffeine
  withdrawal as a disorder in the DSM and revision of diagnostic
  criteria in the ICD.


More explicitly (emphasis my own):


  Of 49 symptom categories identified, the following 10 fulfilled
  validity criteria: headache, fatigue, decreased energy/activeness,
  decreased alertness, drowsiness, decreased contentedness, depressed
  mood, difficulty concentrating, irritability, and foggy/not
  clearheaded. In addition, flu-like symptoms, nausea/vomiting, and
  muscle pain/stiffness were judged likely to represent valid symptom
  categories. In experimental studies, the incidence of headache was 50%
  and the incidence of clinically significant distress or functional
  impairment was 13%. Typically, onset of symptoms occurred 12–24 h
  after abstinence, with peak intensity at 20–51 h, and for a duration
  of 2–9 days. In general, the incidence or severity of symptoms
  increased with increases in daily dose; abstinence from doses as low
  as 100 mg/day produced symptoms. Research is reviewed indicating that
  expectancies are not a prime determinant of caffeine withdrawal and
  that avoidance of withdrawal symptoms plays a central role in habitual
  caffeine consumption.


As for health risks, beyond the symptoms of withdrawal, caffeine has been linked to a number of conditions, such as:


Aortic stiffness among hypertensions patients.
Incontinence among women
Insomnia
Cardiac Arrest


So to summarize: Yes, you can be addicted to caffeine. No, it is not a myth. And it seems like you need as little as 100mg a day to be addicted, that is the equivalent of 1.5 espresso shots, according to this link.. Prolonged caffeine use can be harmful, moderation is recommended.