Flap - I feel for you, I had three girls and know the problem. Just stay in communication with the daughter, don't stop talking - remember she loves you more than the bum and she will eventually come around.
HA! Having been the daughter I can tell you the spell is great and you likely will not break it. However if you TRY you will probably only upset her sending her further into the spell.....
Your best bet is to keep talking to her but carefully ....and after the "love dust" settles things become clearer...
the only way is to cut your throat....i feel for ya , as a dad its sucks. i have no advice for you, but listen to jenn . sounds like she 's been through it.....