How do you decide whether to maintain connections with family who have been disrespectful or dismissive, especially when it affects your partner?

What should we do if we say "I hate you" to someone we love? Is there any chance for the love to come back?
Why do we often feel more isolated in modern glass-and-steel cities than in chaotic old neighborhoods with narrow streets?
How do you maintain a strong emotional connection with an older teen who has started to become more private or distant?