As I approach 40, my standards for relationships are becoming increasingly clear.

This applies to everyone from people I meet in my professional life to even my friends from school.
If a relationship involves mutual support, healthy values, and helps both parties grow, it is worth deepening that connection.
However, no matter how long a relationship has lasted, if the person lacks basic decency, shows no personal growth, or constantly says strange things or acts rudely, the best answer seems to be gradually distancing yourself (cutting them off immediately can be risky).
Looking around, a person's true value and character become increasingly clear. At the same time, it gives me the mindset that I, too, must strive to become a better person.