I give positive support to those who need it.

Support gets easy when you agree. The test is the friend leaving a stable job for something you privately think is a mistake, or going back to a relationship you were relieved to see end.

You can say your piece once, carefully, and then you have a choice about the next two years. Most people say their piece roughly forty times, which is not support, and are then surprised to find themselves told less and less.

Positive does not mean pretending to agree. It means making clear that whichever way this goes, they do not lose you over it. That part has to be said out loud, because it is never assumed.