I have no proof and I know that but I always believed that when Voldemort told Harry that Snape only desired Lily, that is how he felt (or at least that is how he believed he felt) about Bellatrix. Also, do you think Bella loved him for who he was, or was he her saviour, and she loved his persona and the life he offered her?
I do agree that's how he might have explained his feelings away, at least in the first war, before he started making tremendous sacrifices for her.
I think she loved him for all of that. In the books, it's pretty clear she is the only one who's ever seen him as a person, a human being with needs, and the only who's ever understood and accepted him for who he is, and unlike others who claim to understand him, she is the only one who still treats him as he wants to be treated, which is why he feels truly safe with her. Of course, she also loved his power and the life he gave her, both of which are also not really separate from who he actually is.
I don't really believe he had a 'persona'. Lots of people act as if he created an alter ego to hide behind, and I find that really silly, childish, and indicative of how little they understand him.



















