You cannot erase the troubles of this world, but make them your own. If you take on someone's troubles you do not cure them of it, but duplicate it onto yourself. You may perhaps cure them in yourself, but that doesn't mean you can cure them in others.
As frustrating as it is, you must accept that you are only one person and can do as much as one person can do. At some point you will have to say "I've done all that I am able to do." You can listen, you can console, you can advise, but you can't do it for the entire world.
How do you suppose the scientist that wants to cure disease narrows it down to the one that work on? How does one choose AIDS over cancer or vice-versa? I'm sure it's a very personal decision, but it is a decision that has to be made. You may have to decide that you will give out your love and support in return for love and support, because that's what it sounds like you need. And there's nothing wrong with that. We all have to be a little bit selfish to keep ourselves healthy. If you want to fight the good fight then you're going to have to keep yourself in shape for it. I know you can do it, Cindi, but you have to choose to do it!
~Hugs,
Kelly