Okay, I thought you were in the home and she had moved out....and you were putting up the tree where you lived. Sorry I got confused about that.
You are wanting to reach out and help her, but she doesn't welcome it, yet. As you said, her parents are there for whatever she needs. But, if she still loves you.....her parents can't replace that void that you filled.
Back off and give her plenty of space. That's what you have to do in these situations when you try something and it doesn't work.....you learn from it.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!