If you feel like you're working hard to help others but no one seems to be appreciating your efforts, so what? If helping others was your true motivation, then why do you need recognition? If you're just trying to be good in order to get credit in someone's eyes, stop. There is no point in being kind unless you mean it. Not only will the act fail to impress people, the charade will cause you a lot of stress. Just be you and if that means being a little bit selfish, so be it.