I have to disagree w/this. If anyone deserves that Gold Medal for unrequited love it's Julia! Willie would get the Silver though.
As Homer Simpson would say, D'oh!!! How could I have forgotten Julia? She definitely holds the record for the longest unrequited love for someone (who only sees her as a meddlesome woman/threat/friend.)
The vampire Barnabas only saw her as a woman who meddled too much in his affairs even though she was trying to cure him and then a threat when he learned she was trying to upset his plans, while the human Barnabas considered her a dear, valuable friend but no more than that.