I didn't had any bolt/arrow in the inventory, I was in the process of crafting them, I had my crossbow just built, and i just deleted it with NBTExplorer, tried loading the world again and crashed, the first crash was when I clicked a barrel ( I think i had the crossbow in my hand, don't know if that can make a difference ).
( It was the first time I used an nbt data editor, I went to level.dat -> data -> playes and went to the inventory there, i don't know if I did it wrong )
Edit : Deleted everything from the inventory, now it loads correctly, i'll try to load a backup and find which ID was the one causing the crash, I don't want to lose all my inventory XD
Edit2 : It was the ID 5837 ( I don't know if that may be helpful for someone... ) I tried without deleting the crossbow and it worked, just had to delete the 5837 item ( I don't know what i've lost, but in-game that ID are the crossbows o.o I only had 1, so I REALLY don't know what i've lost XD )
thanks for your help :3