For some inexplicable reason, I decided one day to withdraw from everything in my life. At the time, I was studying abroad at university in Bremen, Germany. Instead of going to lectures, I retreated into a cocoon of duvets and a world of fantasy limited to the confines of my bedroom. I shut out the outside world and ignored all calls from friends and family. The only time I went out was late at night to the nearby convenience store to buy a bottle of coke or beer. The shopkeeper noticed my gradual deterioration and asked me if I was alright. The misery etched in my face was very apparent.