Jeremy will be back - Dont freak out

First of all being a hunter does not make you super-natural. You could be a vampire hunter and be human, vampire, witch, etc.

Secondly, when Bonnie was doing a spell, she might have taken his hunter-mark away, so he won't die,cause Silas is super-natural. And he had his ring on.

Thirdly,even if jeremy is not human, he will still be back cause he got killed by super-natural and he is super-natural himself ( i still believe he isn't but this is a possibility)

And last but not least, Silas can bring people back from the dead, so if Jeremy is dead, then they make Silas bring him back.

Jeremy will be back, i don't know if by the end of this season or not but he will be back, for sure for sure for season 5!!!!

I'm a 200/100 % sure Jeremy isn't dead, he is just temporarily gone, HE WILL BE BACK!!

Till then watch the show and have fun <3