Josh, do you mind me asking what age you are?
I agree with others that it's great that you want to be there for this girl, but you seem so frantic to get it right in your posts and for answers that people here aren't really going to be able to give you. You've started three posts, all pretty much saying and asking the same things - I'm wondering if you feel there is something missing in the responses you're getting that you really want to hear?
Your (ex?) girlfriend (I'm not really sure what you mean by hiatus) is the best person to ask about what she needs from you - be prepared for that not being swamped with the support you want to shower on her though. The fact that she wanted a break from the relationship says to me that she 'might' not cope so well with that.
Take the time to sit down with her and ask what she wants from you right now.
Do you still have a therapist for yourself? If so it would be good to talk some of this over with them.