your officemates may be friendly to you and you to them but that does not necessarily means you're friends. It is much better if you keep your personal life PRIVATE...no need for them to know where and what what you and your other friends (or GF/BF) did the night before or over the weekend.

2nd tip: DO YOUR JOB and work...you're being paid to do so...why mind your officemates. You came to Qatar to work...