Holi phobia. Solution for that problem!

Holi phobia since my childhood.i just dont like anything associated with holi whether it be gujia or colors. i avoid all the circumstances whichever evokes the feeling of holi festival like i stop going to market before 1 week only.i am mbbs 2 year medical student and now all these phobic symptoms are really making me depressed somewhere .i have left several exams due to this phobia in my past but now as it is not possible it is creating lot of problems for me.even when i went to the psychiatrist and when he told me about the exposure therapy as the treatment i can feel the anxiety in me and now continuously i am thinking about that.i dont want to go for the exposure therapy so i want to ask is that the only solution for that problem