Why?

I just don't understand why is it when I help out others it Always back fires on me? :( I just don't get it, I have done so much for others and this is what I get in return?! I am at a complete loss and frustrated.. :/ I know not everyone is greedy and selffish and all but me trusting you is not something to take advantage of and it doesn't come easy either. I wish some people would see that and understand that. But it is what it is. I guess.. I don't know. I really appreciate you all and lots of love and take care. :) <3