1. Should Bella confide in Jacob about Edward, her hallucinations, and her depression?
......no. I'm all for confiding because it's generally very helpful, but in this situation, telling Jake about her hallucinations, depression, and Edward-withdrawl(to put it lightly) would not be a good idea, nor would it turn out well. Because no matter how hard he tried, there would be NOTHING Jake could do to heal those wounds and it would only wind up being more painful for both of them.
2. Would it be settling for Bella to hook up with Jacob? Should Bella try to find happiness with Jacob even if she can only give him part of her heart?
Yes. It would post definitely be settling for Bella to "hook up" with Jake. We see that her whole heart will always belong to Edward. It's too unfair to settle on Jake simply because her "fickle Romeo" is absent. I see it as, if you can't give all of your heart, don't give any of it.
3. What about Jacob? He loves Bella despite her strictly platonic feelings towards him, but should he wait out for someone who loves him as much as he loves Bella?
Yes. There's no need for him to waste away on Bella. If there's love, it must be mutual on both sides. Bella can't give Jake all of her, he needs to find a girl who can. He deserves that.
4. How do we factor in the fact that Bella now owes Jacob her life both physically and emotionally?
There have been numerous relationships(purely platonic) with similar situations. Bella will always owe Jake her life emotionally, physically, spiritually, etc. but it doesn't go past that to where they need to have a romantic life together. They'll have a very strong friendship where they can love each other and Bella will always be eternally greatful to Jake.
5. Is Romeo and Juliet's relationship similar to Edward and Bella's? How is it and how does it differ?
Bella and Edward hold very many similarities and differences with Romeo and Juliet. The main similarity: They both will die for the other. The main difference: Bella and Edward's relationship is less mercurial in the sense that for both of them, there had never been anyone else in their past. Just the two of them. Now and always.
6. Should Bella have chosen to investigate Carlisle's car? Is her relationship with the Cullens masochistic?
Nope. She was right to go on her gut instict. Gut instincts tend to be correct, even for Bella. Especially for Bella. Of course her relationship with the Cullens in masochistic, but for both sides. Being around Bella is painful emotionally and physically for the Cullens but ALL of them put up with it because they love her as she loves them.
7. How does Bella and Jacob's relationship compare with Bella and Edward's? Which one is "healthier"?
Maaaaany comparisons. Too many really...Jake and Bella's is healthier in the long run, but Bella and Edward's is healthier for the moment and on emotionally, but not physically. Physically, neither is really healthy for Bella.
WARNING: EDWARD CULLEN IS NOT EFFECTIVE BIRTH CONTROL! E<3B