The good you did for them, the pain you relieved them from, the smile you put on their faces even when you were facing your own trials. The Almighty never forgets. So keep doing good because goodness will come your way sooner than you ever imagined.
If you’re having doubts about someone’s character, observe them over a period. Time will expose the true person. Remember, you can’t fake it forever. Sooner or later the real identity will emerge.