Just because you aren't given the credit and haven't been recognised for your work doesn't mean you have to give up or stop. You don't always need credit, other people do not always have to know what you are capable of doing as long as you do.
"When I was young, I used to admire intelligent people; as I grow older, I admire kind people." I could not possibly tell you how much I love and agree with this. To have both qualities in one person is such a gift as well.