It's not what you do, or what there is to do, it's who you do it with! A weekend alone is not good, you need to meet someone or some friends to spend time with, then the weekend will be too short. Although there is much to do in Doha, it is boring doing it alone. Take up a new sport or hobby that involves meeting people. I started playing golf and met loads of people.

Let me know how you get on.

Rob