Why does it feel that the more space I give her just makes me think she will just distance further from me and quicker
The point is that it's to protect you. The longer you are enmeshed in her actions the harder it will be for you. The detachment is for your benefit so that you feel better. Continue on your path and if she follows then great. If not then you will be in a better place emotionally to manage the changes that are happening to your relationship.
Me:43 Her:42 M:14 S:9 EA started 2014/03 (or there abouts) PA started 2014/05/30 BD:2014/11/05 I left 2015/10/01 I returned 2015/05/02 She left 2015/06/10 OM still on the go.