Does my hair need conditioner?

ValerieZombee
I have not used conditioner in five years, because I have fine, thin, extremely straight hair. It weighs it down and makes it greasy no matter what I have tried. Does it look like my ends could use some sort of fancy deep conditioning treatment? Any recs for something that won't make it heavy and greasy? Is it normal to not use conditioner? Or am I alone in that?