Do you have any blackholes in your life? People who seem to suck the life out of everything around them? People who you invest time in but at the end of the day make no difference because they are who they are and they're going to do what they want to do regardless of your insight?
The good news on earth is that we can control blackholes in our personal universes. They don't have to exist. If we stay clear of their gravitational pull, we'll have nothing to worry about. It can sometimes feel bad to let go of these blackholes because it makes us feel like we're not a good friend, but at the end of the day the best we can do for ourselves and those in our inner-circle, is to pursue being mentally healthy and quite frankly we should let go of some people who negatively impact just that. Don't allow black holes in our universe.