If she's in an EA or a PA things will *not* improve for you. All you can do is really avoid making things worse -- and sometimes making things worse is actually better for you in the long run.
In order for her to notice you in a positive light her affair needs to end, she needs to mourn the loss of it, have some emotional space to reset and figure herself out without any outside emotional pressure (from you) and once her grieving is done she needs to decide not to replace her affair with another one.
For you that means a lot of waiting, more patience than you think you're capable of. It's a marathon not a sprint.
Acc
Married 18, Together 20, Now Divorced M: 48, W: 50, D: 18, S: 16, D: 12 Bomb Dropped (EA, D): 7/13/11 Start Reconcile: 8/15/11 Bomb Dropped (EA, D): 5/1/2014 (Divorced) In a New Relationship: 3/2015