How we cite our quotes:
It was impossible, being in this house, not to realize that Charlie had never gotten over my mom. (1.70)
The marriage might be over, but Charlie is still in love Renée. Here it's interesting to note that the only human marriage we see – that of Charlie and Renée – ended in divorce, while the vampire marriages seem quite strong, and have been for decades.
And then there was [Edward's] family, looking on from the distance, with expressions that ranged from disapproval to fury but held no hint of concern for their brother's safety. (3.51.1)
After Edward saves Bella from Tyler's van, Bella is surprised that his family does not show concern. What she doesn't know is that they're immortal (a van isn't going to hurt Edward). Although they might be a little concerned that Edward has given away their secret.
[Edward to Bella:] "That's not it," he disagreed, but his eyes were too innocent. "They don't understand why I can't leave you alone." (12.108)
Edward explains that his family doesn't understand his love for Bella. It's important to note that Edward's involvement with Bella isn't just about him. If Bella gives the Cullens' secret away, or if their relationship "ends badly," it hurts all of the Cullens, not just Edward.