Would this be a good guess for the above?

Tá grá agam duit, agus béidh mé go brách.

Tá grá agam duit - Love is at-me to-you

so in the future:

Beidh grá agam duit - Love will be at-me to-you

You can't use "mé" - not you will be but love will.
You have to use agam.

But to shorten the sentence just leave out everything but the verb:

Tá grá agam duit agus beidh go deo.

OK, I get why I can't say ...beidh mé..., but what would be the difference between
...agus beidh go deo

and

...agus beidh go breá?

You mean ... go brách

I don't like last judgments. It is too apocalyptic.

Wrong version of brách aside, what's the difference between

...agus beidh go deo

and

...agus beidh go brách?

I don't know the etymology of deo (MacBain says "breath")
But brách (bráth) means or meant judgement, Last Judgement, though obscured.
I'd think go brách is stronger than go deo, perhaps too strong because of its religious reference.