Honestly this sounds like she has stuff to sort out. She wants to be ready but clearly isn't. Sometimes people try to move on before they have fully healed because they don't fully know how they have been impacted.

I don't think she has any ill intent here I think she just needs to step back from relationships for awhile.

You don't need to feel immature. It's perfectly reasonable to expect some sort of commitment or experience some hesitation when starting a relationship with someone emotionally unavailable. You're completely in the right to decide its not what you want and you shouldn't feel bad about it.