Well, Dullan might not (yet?) be ready to die for you, but he sure is willing to kill for you, so, as far as true love goes I'd say he gets a passing grade?
My Isella simping continues in the background, but something tells me she won't be staying with us for long. These plot developments are beyond my comprehension now, and I can only try and rationalize it by suggesting that our protagonists should hit the absolute lowest point before getting better.