Tom and Goldberry. . . ?

[burrahobbit]

but it didn't effect the balrog, who is also a maiar. that is because the balrog did not care about the ring

Bilbo did not care about the Ring. Bilbo was affected by the ring. Also, I would wager that the Balrog was affected in that he was drawn to see what it was.

Besides, if we are going on that note alone

We aren't.

what else would Tom be then, Illuvitar or a Valar?

No. Tom is Something Else.

and Goldberry could be Nimrodel because for one, why not?

No, she can't be. Did you read Sharku's post above?

and also, where does it say that elves can't love more than once?

HoME 10 Laws and Customs of the Eldar, HoME 12 Shibboleth of Finrod

I think that's just an idea of burrahobbit's.

You are wrong.

No offense burrahobbit, but why so negative?

Such is the mystery of burrahobbit.