BustedKnuckles
Footballguy
When Walter white turned into Heisenberg full time i think jesse changed as well...but in the opposite....he lost his stomach for the meth trade and wanted out...finding out WW had been lying to him turning to the cops it was an easy way to pay him backI believe Jesse was exceedingly loyal to Walt.Jesse never struck me as a rat. More had the vibe of being in over his head.Jesse always had that rat vibe about him. In Full Measure, when they were on the run from Gus following Walt's killing those drug dealers, Jesse suggested then that Walt go to the cops and into the WRP.
Besides, once Jesse figured out that Walt really did poison Brock, what better way to get revenge on Walt than ratting him out to the cops?
If not for Jesse's steadfast refusal to break from Walt, Gus would have killed Walt pretty early on.