You will get addicted if you put baccy in your spliffs if you keep smoking them. You won't think of it like you need baccy, you'll be like, oh i need a spliff instead of want a joint. Pure is the only way to go, to experaice the true cannabis experiance. You're more likely to puke while mixing tobacco also, not 100% definate but it could happen. To be honest though, i can already see your situation, all your friends that smoke, smoke it with baccy and will be too stubborn to change. They'll give you every excuse they can: It makes it burn better, we use it to make the joint bigger. I don't care what they say, tobacco is dreadful for you, basically deadful. My advice is to buy a bong, which i sincerely doubt you will. So, all i will say is enjoy smoking cannabis. Not tobacco.