That's just it. She is too eager. She's that desperate to keep that contact with Null. Remember, the girl has been starved of physical touch for years. And now she can touch someone. A guy who (generally speaking) is kind, funny, considerate and from the comments of the girls, good looking. He's a catch and she can be in the running for that. When someone is that desperate, they'll give up anything to keep it. And it's not healthy.
Have you ever stopped to think
why it is (potentially) not healthy to be exceptionally dedicated towards someone?
Because that someone can exploit you or abuse you.
So just don't exploit and abuse her. (shocking idea, I know)
> I don't want my lover to truly desperately love me because it is unhealthy because if I was a shit human being I could exploit her
is one of the most silly ass backwards pseudo logics I have ever come across.
So long as you are not abusing them, it is actually a good thing. Very sweet and romantic. And also means she is very unlikely to betray you. And are very dedicated to pleasing you. It can form a very strong long lasting happy relationship. Where you are satisfied by an eager to please partner and the partner is satisfied just by having you.
It is a conditional effect.
If you are abusing them, only then it becomes a bad thing... for them, not for you. For you it is also a good thing because they are easier to abuse.
So either it is a good thing because loyalty, romance, easy to please, happy long relationship.
Or it is a good thing because easy victim.
No matter what it isn't a drawback for you.
Thus it is not a reasonable reason to reject rogue.