[Jacob:] All this mandatory love-at-first-sight was completely sickening. (8.24)
Jacob complains about love-at-first-sight, because none of his pack members seems to have trouble finding their perfect mate except for him. Or, rather, his perfect mate, Bella, is not returning his feelings.
[Jacob to Bella:] "What was the point of me loving you? What was the point of you loving him? When you die…" (10.59)
Jacob believes that if Bella dies, everything they've experienced together, their sacrifices of love for each other and their joys and pains, will have been in vain.
[Jacob to Bella:] "Why do you always have to love the wrong things, Bella?" (10.156)
Jacob accuses Bella of being drawn to things that endanger her life. Do you think he's talking about Bella's choices or her fate?
[Jacob:] …there was no question [Bella] was in love with her vampire past the boundaries of sanity. (14.11)
Although Jacob admits that Bella really loves Edward, he maintains that her love for him is unhealthy, or insane, because it's unnatural for a human to be with a vampire.
[Jacob:] This was the problem with hanging out with vampires – you got used to them. They started messing up the way saw the world. They started feeling like friends. (14.185)
Jacob acknowledges that he's warming up to the Cullens – against his will. Being friends with vampires deeply conflicts with his world view up until that point.
[Bella to Jacob:] "If feels… complete when you're here, Jacob. Like all my family is together." (15.144)
From the beginning of their relationship, Bella always wished Jacob could be her younger brother, because he feels like family to her. Although she admits in New Moon that she's fallen in love with him, it's a different love that she can't quite explain. Maybe her heart knew that they'd be connected through Renesmee?
[Leah to Jacob:] "Even though I don't think too much of her, I'd probably do the same as the bloodsucker." (16.140)
Leah identifies with Rosalie's need to have children. Apparently being a real woman and not "a genetic dead-end" means being able to bear children and experience motherhood.
[Bella:] So Renesmee was untouchable because of the way Jacob felt about her. I tried to concentrate on the relief of this fact rather than the chagrin, but it wasn't easy. (23.33)
Even though Bella is grateful that the werewolves now protect Renesmee because Jacob has imprinted on her, she feels a bit jealous of Jacob's claim on her daughter.
[Edward to Jacob:] "Goodbye Jacob, my brother… my son." (37.224)
Edward has completely accepted Renesmee's future and the fact that Jake is going to be his son as well as his equal.