Godwin aside, >>100 actually does have a good point. Some people simply don't deserve to be loved. The only questions are:
1) Which people fit into this category?
and
2) How do I know if I'm counted among their number?
I suppose sometimes the answer to 2) is fairly easy to discern. For example, let's say that in addition to my manifest physical defects, I also have problems dealing with physical and emotional intimacy. If these problems prove sufficiently detrimental that I am effectively incapable of responding to affection rendered unto me by a member of the opposite sex, then it stands to reason that, at the very least, I am unfit for love. Perhaps saying I don't deserve it is a little harsh, but that's just semantics. In the end, it's the same difference: I'm alone, and that's the way it's supposed to be.
Ultimately, entrance into a romantic relationship is not an inalienable human right. It's a privilege bestowed upon those deemed fit to exercise it. Those of us who fall outside that category will just have to make do as best we can.