We were together for 8 years, she is diagnosed with quiet BPD, anxiety, depression, and ptsd. 

She seemingly has an out of sight out of mind mentality I noticed before our breakup at times. 

Would that likely apply to me after our breakup? Is that because she blamed me/devalued, self sabotaged, and split me black? Does that last a long time if I am out of sight out of mind?

It hurts because I feel discarded, and I honestly do not believe she is thinking about me because of that out of sight out of mind mentality she has had. 

She blamed me for everything that was an issue for our last year (not that much to be honest) then said she is done with me. I was trying to defend myself because I felt both attacked and confused considering all the blame that she never showed before. 

Again, does out of sight out of mind apply to people with BPD and even as far as splitting someone black? Does it last a long time?