Why is such a privilege to love and to be loved?

I've been lonely throughout my life and relationships evaded me both in teenage and young adult years.

I admit I'm undersocialized, but I made conscious efforts to improve. All to no avail or with little results. I just don't have it. The thing that normal people possess, the ability to be loved.

Even if I'm sensitive and have positive traits on paper, they are not desirable for the average people. And those who would appreciate me are somewhere else, and never found them.