If you do not have a sport, I would recommend you pick up one, like badminton, squash and some others. This is because a sport will allow your mental, physical body to divert the attention to not focus on your stressful work; in contrary, it relaxes your mind and assists to get yourself healthy.
In playing physical strenuous sports, you will tend to perspire. Thus it helps to reduce your weight and discharge unwanted chemical through your body. Some sports requires team effort, thus this will increases your circle of friends without knowing it. Once you have more friends, you will then be able to pay more attention in getting to know about them. Thus you focus less on your stress issues.