DEAR HARRIETTE: I know you usually talk to adults, but I need help. My parents are in the middle of getting a divorce, and it's been tough on the whole family, but it's for the best because their relationship hasn't been working for many years. I am 13 years old, and they told me that I need to pick who I want to live with for the majority of the year. They think it's best that I stay in one spot …