I agree with Wolfwood2, playing a NPC WCV.... wow can they be powerful. No reason to make them more so.
But back to the "True Love" thing, I think that the "imprint" idea mentioned is a very valid one. Intent and believe is everything, and stealing something from somebody to kill is absolutely not an act of True Love in any way. It would devalue the item in any meaningful way.
And again, True Love is very rare. Of six married couples that I know personally, and fairly well, I'd say that none of them are in "True Love". EG: one couple basically only got married because it means less taxes to pay, and still bring that up years after being married, another ... is absolutely in a master/slave type relationship (if only emotionally), another would be fairly close, but they tend to not really value each others opinions on a good number of topics. Don't get me wrong, I'm not trying to demain or belittle them, but just trying to point out that while they may definitely love each other, it's not True Love. It's not that all consuming, all caring, unconditional love of an equal.
Oh, and I'd say if it isn't permanent, it isn't True Love. A relationship like that is built, and worked at, and firmly established. And yes, while it very difficult, it's difficult because you *must* except the other as your equal. How many people do that in general, let alone AT ALL. To be that strong, and get that far, it's already endured a lot, and would not fade. Not without a huge, live changing event (and no, cheating just means you weren't really in love).