Recognize those who stood by you through thick and thin. They are the so-called angels in the outfield. They are the ones who are worth sticking with.
But you should also acknowledge that not all people would be willing to lend a genuine helping hand.
There are those who will remain silent when you have done something worth of a pat on the back or at least some simple words such as “keep it up”. While some may appreciate any form of cognizance of their efforts, there are those who prefer to avoid the spotlight and opt to just work in the corner, relatively unknown like an essential cog in a complex machine. They are more happy and fulfilled that way.
And the same people who were mostly silent on your share of good times with them, would be the quickest to cry for your crucifixion the moment you commit the slightest, even trivial mistakes which would have been easily resolved by a simple talk. Instead of helping you out as an initial reaction, they conspire against you to come up with all the “just” reasons why you do not fit in which is enough to get you kicked out.
Beware of such people because they are the ones who don’t want to have anything to do with you. They will stay silent during still waters but they will be the first to throw you overboard when the slightest tempest rocks the boat.