Don't do it for gratitude, do it for yourself..

When you know you have to do something, that might hurt your reputation with others. But, in the process help someone stay away farm harm. It's hard at times to give up something you've built up for so long, but you need to take yourself out of the equation and see the bigger picture. If something wrong continues then someone will hurt so much more in the long run, others might not understand this and you may have to suffer for it for a little while. But, at least you will have the peace in your heart that you have done the right thing. If you don't ever get gratitude for this, it's alright. You did it because you care about someone enough to go through it, not because you expected recognition.