There are so many things you can do in Qatar, if you really look for it. It depends on you, what is your hobby or interest? The things that you haven't have a change to do in your life? Well, you can not do any white water rafting here, for sure... Qatar do not offer you everything, but you can have most of it.

Go out and make friends. And if you can not make any friends, find activities that you can do by yourself. Some idea: learn Arabic, join a sport club, jog in a park/corniche, fishing, wander around the mall, massage, dance lesson, music class, join a group. Some of these activities will bring you to find new friends and can enrich your mind.