or your favourite... i get called Jecca and Jess or Jezzabell (by my dad lol)
If you can't find a diminutive of Jessica that you like you can always just go by anything else you like. I knew a woman with first name Glorious and middle name Romonica and she couldn't come up with any diminutive of her names she liked so to her friends she just went by Gigi. Gigi would more commonly be a diminutive of Georgina, Regina, Ginette or Virginia.
Jess, Jessie, Jessa, Jay, JJ, Essie, Essa, Jessca (w/ out the "i"), Jazzy. Haha that's all I can think of. My favorite out of these is just plain old "Jess".
that's a crappy thing to say online, have you called her this to her face?
jess, dont take this personally but the Jessica i know i call her looser.
Jess, Jessie, Jessa.. Those are the only three I can think of :/
Hessica, my spanish jessica friend. like jalapeno...
Jess, Jessie, JayJay, Mess, Messy, Jex, Jecka, Jay
well, shes sort of a looser.
i hate that name! lol sorry
my mum calls me Jess :p
hahah why? :P