I was browsing through Shape magazine and saw a small article on "Second Hand Stress". Its a phrase being given to describe when you are around someone at work or in another social setting who is constantly complaining about things and you empathize with them to the point that it becomes your stress.

they say you may not always be aware of it, but if you feel your face getting tense, or you get a headache during or after they have left your presence...then it may be their stress rolling over to you like second hand smoke.