Smelling something that is not there including smelling the smoke but no one else can could simply be that you have some smoke that got up into your own nose from being around smoke or it could be a symptom of a health problem.
A health problem that can cause you to smell smoke but no one else can or smell other things that are not there is the condition "Phantosmia" which can be triggered by temporal lobe seizures, epilepsy, or head trauma.
It could also indicate a brain tumor or other brain condition that should be checked out.
If the smell doesn't go away or you keep smelling things that are not there then a doctors visit would be a good idea to find out if something serious may be going on.