Why is obsessive love only weird if you're not obsessively loved back?
Why is being obsessively in love with someone considered cute/lovely when they love you back and weird/stalkerish when they don't?
I mean, if they don't love you, how can you help it? How can this arbitrary fact beyond your control make you either normal or a social reject? If you are already not loved by the one you love, then isn't that hurtful enough, without everyone thinking you're a weirdo, too?
If we were going to be fair about it, shouldn't loving someone obsessively be weird irrespective of whether they love you back obsessively?