Help, office, personal, job

Hi.I am working in my organisation from the past 2 years.My boss thinks I might leave soon as I appeared for post graduate entrance exams.But the problem is I don't want to go for it this year.But she keeps on asking me when am I leaving as if she really wants me to leave.Also, I am trying to get a new job but unable to get any interview calls.I don't know how to tell her.Its becoming frustrating now as I don't know what to answer.And she has told everybody that I will leave soon