Yes, I can relate very much.

I have been emotionally sensitive all my life. As a kid I used to cry for nothing, was very fearful etc.

And the relationships well.. I havent had much of those because of this condition. When I had something, I was always totally crushed when I saw that it was not going to work. In fact, when I met someone I liked, I got very anxious in the beginning because deep inside of me I knew that I cant do this! Like you said, I knew that I was too "sick" to have a relationship, I was afraid of the commitment and thought that I couldnt handle the "stress". Now I dont even dream about any relationships anymore - til I get better.