What to do with yourself today:
repeat the following phrases:
"I am not responsible for the decisions of others"
"I didn't cause it, I can't control it, and I can't cure it."
"I am only responsible for my own actions."
(similarly) "Only *I* am responsible for my actions and my own happiness."
Then do something totally pampering for yourself and try not to think about what everyone else is doing and whether or not what they're doing is good for them or not.
Take yourself out to see a movie, popcorn/coke and the whole shebang. Or rent a good long movie that you doubt anyone else would ever sit through with you and watch it (A&E's Pride and Prejudice is a movie I like for when I'm feeling kind of like you are). Go ahead and cocoon yourself with things YOU enjoy. Get chinese take-out and a pint of ice cream and treat yourself.
Take care of you. Let everyone else take care of everyone else.