Emotions are difficult, and always will be. I'm an adult and I still struggle with mine. Sometimes, they get so intense that I can hurt myself. Not everyone handles emotions the same way, or something can happen that changes how you handle them.
Then you should understand a bit about how Twig's feeling right now. Like you, being a weapon is all she's known.
*Tear laughs lightly at the comment about Twig being "hot". She's glad that Twig gets to experience a somewhat normal teen romance, she and Revali were already adults when they got together.*
You love it because it makes you feel good. She sees you as a person, because you are one. Even in your current situation, you're still you, not Sora. I've only known you for a day and even I can see that.
When people feel lost, like Twig probably does, the first place they look for is home. However, I don't think she has a home, at least not one she can call home.
Home can be a place, but it can also be a person. My husband is my home, and it ā unfortunately ā took me a long time to see that, because my mind's a mess, too.
I think you're that for her, too. While I couldn't see her expression, I could see in her body language and in her tone when she spoke to you that it really hurt to leave you, to tell you not follow. I think, right now, she wants nothing more than to be by your side.
However, your current situation might also make that an issue. Yes, you're home, but it also feels wrong. She hasn't moved on from hurting you.
I believe the biggest thing is...as she said, the last time she saw you was when she hurt you, then when she next saw you, you were within Sora. It's possible that, in her mind, she sees this as her killing you, because that's what Demise ordered her to do.
*Tear gives Roxas a smile and a firm nod.*
I promise. However, keep in mind that there is a possibility that she does come back after helping Birdie and Sky. It all depends on how things go there.