I take things too personally

I take things too personally. At work, in business, when people decline on the wedding invitation RSVP...

I take things too personally, but how can I not? I take criticisms of my work as direct criticisms of me. I feel far too much responsibility for my tenant's happiness and wonder if I'm doing the right thing in renting out my condo. I jump every time my phone rings because I think there's something wrong at the condo. Every time someone RSVPs 'No', I'm a little sad. Isn't that silly? Maybe I need to harden my heart for certain things; things that don't really matter or need so much of my emotional energy. If someone doesn't like what I make for dinner, I have hurt feelings (so much so that I don't like to cook for others very often). Geez...

I don't want to be so sensitive, but I also don't want to be a callous jerk. How does one find balance in this?