Can't be bothered to eat.

Guys I need help.
Had a messy break up with my boyfriend just 2 weeks ago. Since then I have just had no motivation to eat. When I do try to eat, I can only make it through half a meal and then I feel physically sick. I have no appetite and can go all day without the need for food. Even the thought of foods that I used to enjoy, like chocolate, make me feel physically sick to my stomach.
How can I get my appetite back?
Thanks girls!