What are the biggest reasons people hesitate to leave unhappy relationships, especially later in life?

Why is my male companion such a lover and supporter of me to the degree I would gift my own life for him in a heartbeat?
Why might some people feel conflicted about having had a "safe" childhood free from incidents, especially when hearing about others who didn’t?
How can having a friendly interaction with a police officer, like inviting them for coffee, impact future encounters with law enforcement?