Most Helpful Guy
Well technically I think it's indifferent. If you want to tell her that, you should. But only if you know she is kinda over her relationship.
Most Helpful Girl
No, I think that can maybe be seen as a bit condescending if she's really sensitive right now. You should just do your best to get her to forget about him by talking about other things and doing fun things together. Then when you can see that she's truly happy again, bring it up.