i randomly acquire humanity from time to time and not in item form. why is this or is it kinda random cuz i dont think thats the right answer by a long shot

Well I don't have an answer but that has happened to me before as well and I haven't figured it out yet

Hm u get humanity from killing bosses and npcs, and i THINK from not dying a certain amount of time

man whats with the huge influx of new members? No one on this post has posts count higher than 8. damn. 
 
to answer the question, no idea.

I guess Dark Souls brings them out?

I think defeating some of the stronger enemies yields some. For example a dark knight maybe. I'm guessing the ones that don't respawn after camping.

I was getting some once an hour from grinding the main area of Undead Burg early in the game, I cant be sure but possibly just a low droprate?