My Joy on the Left, My Pain on the Right

I often feel other peoples' personal happiness is my responsibility. Like, if someone is having a bad day, it's my job to cheer them up. And if I can't, there must be something wrong with me. I've heard men are wired to be fixers, which is probably more true in me because I'm such a control freak. When people show anger or frustration, even if it's not directed at me, I take it personally. When someone is upset with me, I have to make things right. I know everyone has their own hang-ups and issues, but I can't get past the feeling I should be doing something to help. How far do I go to help others? What if my help isn't wanted?