Thanks for the clarification. I was wondering if "cion" could be used with the same prepositions as "grá"
Tá grá ag duine ar duine eile/do dhuine eile.

And one more question please. It would be my inclination to put the "agam" at the end of the sentence, - Tá grá ar Aubrey agam - but I see from all the sentences offered here that the order is "tá grá/cion agam ar Aubrey". Could either order be used here or is there a difference in emphasis?
Or is mine just wrong?
Hope you don't mind me asking so many questions. For my part I'm glad I found a place to ask them.