False friends are like our shadow, keeping close to us while we walk in the sunshine, but leaving us the instant we cross into the shade.

Some closeness is a response to your circumstances rather than to you. It is not always deliberate deceit, since people are drawn to warmth and drift when the warmth goes, often without noticing themselves doing it. The difficulty is that you cannot tell the two kinds apart while things are going well. Trouble is the only test, and it arrives without warning.

Think back to a bad stretch and notice who was actually there. Those are the people to invest in now, while nothing is required. And when someone else is in their own shade, be the one who does not find a reason to be busy.