Hi Jinny
Having to take diazepam for a short period ot time should not be too much of a problem but, if you are taking them often and "like" the effect they have on you, you should just be careful that you do not "like" them too much.
They are highly addictive is abused so, if you only take them when absolutely necessary then it should be fine BUT, if you are taking more than about 3 a day, you need to start cutting down and trying to cope at time without them.