There are plenty of businesses that require compassionate people. You could set up your own "help the [whatever section of society you want to help]" charity and run it from there. And contrary to popular opinion there are loads of funding grants you can apply for that are just ripe for picking.

But like all things in life moderation is the key - so if you plan to heal the world with your awesome compassion then you'll need strong barriers with a healthy dose of "fuck you" to protect yourself. Because you, my friend, are number 1. And you can't be helping people if you haven't got your shit together :)

Pro tip: You'll never get anywhere in life if you don't learn to stick up for yourself, because people will take advantage and walk all over you, I know this through hardened experience. In fact, I can feel a post coming on lol