I feel I am being good to every one, but no on is really good to me....WHY?

I feel that I am always good and help people, with out expecting any thing form tham. But I always feel ignored and some time feel that they dont want to help me.. Who is that I feel so? Does this happne to every one.. I feel people manipulate and tink a lot before they want of talk, where as I am always open minded, ai just go for what i good for them.. Why do I have to have so much of patience and why am I good for these ppl, if the really dont care about me? Why should I be so nice ?............................