As Walt either wouldn't or couldn't do anything to save
To put it simply, Walter preferred Jane dead. As Travis Addair said in his answer, she had enough information about Walter to bring his world crashing down. He knew Jane would not be easy to manipulate or control.
While Walt is trying to wake Jesse, he inadvertently and unknowingly knocks Jane onto her back; she starts to choke on her own vomit. Walt rushes to help, but after hesitating for a moment he changes his mind and lets her die.
Did Jesse forgive and still love Walt at the end? Nope. Walt absolutely destroyed Jesse's life. He did unforgivable things to Jesse, such as letting his girlfriend die and poisoning his other girlfriend's son just to manipulate Jesse.
2. Walt knew that since Jane's death and since that day he went with Mike and found him at the crack house, he knew Jesse felt guilty for Jane's death. Jesse told Walt - whilst he held him and he cried - that HE was the bad guy, that it was HIM who killed Jane. He carried that quilt with him from that day.
Throughout Breaking Bad, Jesse finds himself constantly suffering as a result of his involvement in Walter's business. He's beaten, nearly killed multiple times, imprisoned, and suffers severe anxiety and depression as a result of his experiences.
To put it simply, Walter preferred Jane dead. As Travis Addair said in his answer, she had enough information about Walter to bring his world crashing down. He knew Jane would not be easy to manipulate or control.
Many thoughts of grief may have flooded Walt's mind after Hank was killed in Breaking Bad, but the reason why Walt tells Jesse the truth about Jane's death is indicative of his true nature. Walt's evolution to becoming Heisenberg was created out of a series of events of desperation and tragedy.
Jesse didnt care about Walt going to jail, he knew any prison sentence would be meaningless anyways since Walt was going to die shortly regardless. He wanted to take Walts money from him, which was the only thing that Walt cared about and the only thing that could possibly hurt him.
Throughout the five seasons of Breaking Bad, Walt caused the death of almost 300 people, directly or indirectly. As the character descended into wickedness, Walt didn't necessarily seem to fall under the label of a psychotic murderer.
She was in love with his money and the 99% pure meth he had pounds of, but she didn't care anywhere near as much about him as he did for her. She wanted to get away from her father after she started getting high again and was the one who threatened Walt if he didn't give Jesse the money he was owed.
No. From the moment Walt had him dragged out from under that car in the desert, Jesse never forgave his former partner. From that moment on, Jesse felt nothing but hatred and resentment towards him.
Flies (Diptera) are common insects that appeared in Breaking Bad. It has been speculated that the fly represents guilt, contamination, irrational obsession, and the loss of control in Walter White's life. When a fly gets into the superlab, Walt embarks on an obsessive quest to destroy it ("Fly").
Absolutely. He could have turned her over and allowed her room to vomit without drowning in it. He could have left and made an anonymous 9–1–1 call. Walt let Jane die so he could ensure Jesse's survival, which is warped, but with her death, he could control Jesse again.
The bear itself is considered very symbolic in Breaking Bad. It has been said to symbolize the consequences of Walt's actions, or his loss of innocence. It also appeared to foreshadow Gus Fring's death two seasons later; an explosion would leave him with burns almost identical to that of the bear.
I understand the second time Walt ordered Jack to kill Jesse (in the desert after Hank died): Walt felt betrayed by the seemingly only person he held a soft spot for (other than his family). Jesse did something Walt never dreamed he would do, which was spill to the DEA.
“I've made a mistake. It's all my fault. I had it coming,” Walt confesses. Walt isn't just crying because he's ruined the only real relationship he had (both business and personal), but he's crying because he's realized the mess he's made of his life, and those around him.
Jesse, however, was left with $5 million that Walt gave him out of guilt.
As the Whites leave, Walt gives his in-laws a DVD of his "confession." Playing it at home, Hank and Marie discover they are being blackmailed. Walt's "confession" states that Hank masterminded the Heisenberg empire and forced Walt to cook meth for him.
At dinner at the Whites, Hank goes to the bathroom and while there, pages through a copy of Leaves of Grass that Gale had given Walter. He recognizes the writing from Gale's notebook, and from Gale's dedication to Walt, is shocked to conclude that Walt is Heisenberg.
In the season 5 episode Confessions Jesse realises that Saul and Huell took his ricin cigerette on the orders of Walt (Jesse finds this out by threatening them with a gun) which causes him to also realise that Walter was behind the whole false story of Gus poisoning Brock when it had been him all along.
In the original story Walt injects Jane with another hit of heroin while she's unconscious, murdering her. This was toned down to a version where he intentionally turns her on her back so she chokes to death on vomit. In the filmed version, Jane accidentally turns on her back while Walt was attempting to awake Jesse.
In 2016, Vince Gilligan finally revealed the true reason why Walter broke up with Gretchen and left Gray Matter: he felt inferior to her and her wealthy family, confirming that it was due to his ego and pride.
After realizing that it was Walt who poisoned Brock, Jesse went ballistic. He wanted to bring Walt to justice, even if it meant he has to confess to everything he had done up until that point as well. As a response to this betrayal, Walt put a hit out on Jesse's head.