chiming in late.
That is HARD. I found myself absenting myself a lot from work stuff, socialising, lunchroom chats, really isolating myself. It helped protect my heart but boy I got lonely and pretty bitter too.
If you feel you can, let her know that there will be times you need to stand apart from her...
I hope you find a way to bear this.
It is really really hard.
sending you a hug.