Well she was always seemingly interested in romance. Probably for reasons any child would like it. But I think once she was separated from the world growing up, that loneliness likely added to the appeal of finding someone who is there for you no matter what.

Yeah maybe but it could also be lack of parents love could it be that her parents spend more time on Elsa then her ?

Hm that’s a good question.

I think it could have changed depending on the time. Early into the seperation I would assume their parents would spend quite a bit of time with each of them, since there would be a lot of confusion, anxiety, hurt feelings. But probably more with Elsa to try to give techniques to control her magic early on. Then over time as Elsa pushed everyone away, not wanting anyone to go near her, they might have had more time for Anna(?).

In the book Dangerous Secrets it says how Iduna spent all of her time (I think it was at least weeks before their voyage) studying about Elsa and Ahtohallan - more than usual - where she would forget to sleep, eat, bathe. So certainly then she wouldn’t have spent time with either of them.

I don’t recall any books or anything that implies Anna having a bad relationship with her parents. At least other than her feeling like they couldn’t trust her with the secrets (in a few books and also deleted movie scenes).