Smoking a lot of spliffs lately, am i addicted to nicotine?

i used to only smoke blunts, but lately i've been smoking a lot of spliffs (marijuana+tobacco). i don't smoke cigarettes, and i don't plan to start. spliffs just give me more of a headrush. last night i smoked a small spliff and i woke up still feeling high (this happens to me a lot though) but this time it was a little different. i felt like i wanted another one. am i becoming addicted to cigarettes by smoking spliffs? and what are the symptoms of being addicted?