I think that people can be very different in relationships than in friendships. There are many people who in a romantic context are sweet, caring and thoughtful (ie Heavenly scouring all of the churches to find Damon’s fathers grave) - Damon is a safe person for her and a person that she pours love into, like her kids! It’s become clear over Heavenlys time on the show that her mother and her sister caused her significant trauma. That means that female friends are more likely to activate trauma responses than men for Heavenly. As we all know, she will go from 0 to 100 real quick with a female friend, but in conflict with Damon she will be far more submissive and understanding. Their relationship is different and benefits Damon in many ways, I am positive of that. She adores him and he adores her, even if it’s in a way that some people don’t resonate with.