Even though it may not be noticed and you are not thanked for your help, the energy alone of you helping is feeding the "bigger picture". Maybe your not looking in the right place to find your reward? That what seems to be causing this post you made im gathering.

Also i agree with Rena. You have to surround yourself with people that are going to help you grow. Otherwise, your going to find yourself in this constant state of feeling used.

Ultimately by helping others you are in fact helping yourself. With that in mind you need not others to give you recognition or appreciation of your help.