Whatever you do, don't be her cuddle buddy or emotional tampon. Too often, girls (and probably to a lesser degree, boys) don't want to commit to the relationship but want all the emotional trimmings. Meanwhile the not-partner finds themselves giving, giving, giving all the emotions but getting no relationship in return.
I think it's good that she's taking this week to figure things out. But I strongly suggest that if she comes back wanting you as a 'friend' that you say No. Explain to her that having her as a friend would only serve to remind you of what you can't have and that it won't help you get over her.
If she's got a good heart, she will understand. If she's selfish, she won't understand....but remind her that if she *really* wants you in her life, she can have you as a boyfriend.
I hope she wants to pick the relationship back up. But if not, don't accept second best.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.