Your other choice is to hope that her new realationship comes to an end. In the meantime, be her loyal friend, and the best possible father.
It's possible for her R to end. I have read that the "in-love" thing lasts for about 18 months. So, if she and BF don't understand about the in-love thing being a fantasy thing, it's very possible for the R to cool off. And her seeing your changes can surely make her wonder what she could have with you. Yep, even though it's hard loving her, please don't beat yourself up. Pat yurself on the back for having done so well.
