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I would describe friends in terms of plants (a thread) https://twitter.com/miamingus/status/1305691748652314625
Some people are 'trees' in our life. Those who are everpresent, interesting, there to stay. Each has a different set of values that they bring to you...sometimes nourishment, sometimes beauty, sometimes protection. These are usually spouses, family, best friends.
'Shrubs and bushes' are less important than trees, but like trees, they are there to stay. They provide different value, but it's situational. These can be childhood friends, coworkers, schoolmates, old roommates, and the like whose company you enjoy that you keep in touch with.
Then there are the 'annuals' friends. They are around when the situation is right, they are short-lived, they might come back or they might not. These are like the childhood friends, coworkers, schoolmates, old roommates, and the like that you don't keep in touch with.
There are 'vines' who can be quite nice in some situations, but need boundaries. You know who these are...
Some of these plants can be 'thorny' and need to be handled with care.
Some provide nourishment through 'fruits and vegetables.' You enjoy some fruits and vegetables more than others.
Some plants require more maintenance than others. And, of course, most people are just weeds. 
